Endurance Warranty Services review: Extended warranty coverage

I purchased a used BMW and those are expensive to repair, so I figured I would see what Endurance had to offer after THEY CONTACTED ME from a google search. The sales rep told me that he also has a BMW and had to file a claim and they paid for everything, except the $500 deductible. He also informed me that it would cover everything except maintenance and was the absolute best plan, so I went with it paying just over $215/month. I noticed recently my rear air bags were leaking, so I took it to BMW since although they will cover a repair by any ASE certified mechanic, no one in the area will work on a BMW, so I pretty much have to go to the dealership. After they contacted Endurance to tell them my car needed rear airbags, they were told that Endurance will only cover aftermarket cheaper parts found elsewhere, which BMW will not install and will not warranty. So now I have no dealership to install the aftermarket parts that only Endurance will cover because they are cheaper. I called Endurance and spoke to a rep who told me that it is up to the Administrator's discretion to cover either manufacturer or factory parts, which is a very small part of my contract and was never actually disclosed to me. Although it is in my contract, when I was verbally sold this contract, NONE of this was said and I was actually told that this plan was great for my type of car and would cover everything on the car besides maintenance (tires, headlights,) The rep I spoke to on the phone regarding this issue specifically informed me that they contacted other parts stores which were cheaper and gave me the contact info for other auto repair shops to see if they will work on my car. This is ridiculous. When buying any luxury/high end car, not just any auto shop will or can work on the car. Now, they are only covering a measly $500 (or so) to my almost $2,000 bill. After review, there are many lawsuits open regarding this exact issue with this company, so I am now looking into this.