Tires Plus Total Car Care

i called to make appointment to have tires rotated on 4 runner, because I bought 4 firestone tires from them. I asked after they finish can they fix tire on my murano sv the tire pressure light keeps coming on for. He tells me that they could not do both on same day, I thought was odd, neither were that big of a job. I had taken my murano to them and bought winter blizzack tires for murano and was told my yokohamos had one more summer season. After winter when they took blizzacks off murano and put back on my yokohamos the next day tire pressure light came on, and I had taken in to them several times to check pressure, it was back right passagener side, they refilled with air, however after couple days would come back on, so I call to have truck rotated and for them to fix whatever was wrong with tire. I assume it was a very slow leak, the tire never even looked low and was never flat.
the murano went in first, he calls later to tell me that he can not fix due to thread that i need new tires, he mentioned he noticed i had an account there and apparently could see my accounts information, and seen I had zero balance and talked me into another set of tires. when they put these firestone 150 a tire on my car, i seen bill and the added charges for warranty and hazard, he never asked if I wanted to purchase, the tire came with a 60, 000 limited warranty already. once tires were on and i get into car, i noticed when starting my car all the arrows on dash, speed, gas, rpm, temp all move completely to the right and back to zero, wierd it has never done that, so i look at paperwork and notice they did "courosity battery check" without ever asking and knowing they are not my machinic, never had car serviced with them only tires, so i was going to call once i got home, i was traveling down hwy and once car reached 45 50 mph, it felt as if my front end was coming apart, extremely unsafe feeling, I called and pulled car off road, explained what car was doing and I just left from there, he said to bring back, I did, then they call to say its ready, I go in and he says mount came off and he rebalanced all four tires, ok I get back in and get to hwy and again, car doing the same thing, so I call back, however its nearing 5pm hour, they closed before I arrived back, I took in next morning, I go back in 2hours and he tells me its not the tires, it might be my engine or transmission, I said no way in hell, it wasn't like that when I drove it in here, or ever, I had my machinic across the street call them, he had recently looked at my car and looked up a couple things, he could confirm there was nothing wrong with the engine or transmission. so I contacted him in tears after getting off the phone with tires plus corp. office filing a complaint in tears because they ruined my car and not taking the blame. I was told I would be called within 48hours and no one called me, my machinic called after tires plus just told me it wasn't the tires they just sold me it was the car, they tell my machinic a different story, they say it was a couple tires and they going to order two more and fix first thing in morning, tire were on 3pm delivery truck, I didn't get car until 420 next day, and still doing the same thing. I am sending these tires back tomorrow, I will not pay for them, I want my account credited, and I will never go into that company again ever. that tire pressure could of been a value, who knows, I had three guys plus tires plus guy tell me those tires had enough thread to make it to winter, they had my car four days, sold me 700 tires, third set from same store, and screwed my car up, and I am going to Nissan to find out exactly what happen. and damage done by them, they had no business going under the hood of my car. they say its a courtesy check, courtesy my butt, they should of asked, I have never had they service any of my vehicles only tires, therefor they should of ask first before ever going under my hood. sorry firestone, its not your tire but tires plus in Gardnerville that lost this sale and customer, who, there were severally, I will not be stepping into that building again, I will not buy these tires I will be returning them in morning and want a full credit and if Nissan says what they did caused what my car is doing, I will tell my attorney to start paperwork. unbelievable, this store, poor poor poor customer service, and they do not do it right the first time, every time I have gone in there, problem after problem and because of them.