Kwik Trip

I stop often and buy pizza. Not enough topping options so I asked once about adding toppings. They did and used the extra toppings charge at the register. Not a problem. Tonight I was told that they are not supposed to and the woman in the kitchen refused. Why is there a charge at the register if it is not an option, and why wouldn't it be? I spend upwards of 100 bucks a week there, that is 5, 200 a year and I cannot get mushrooms on your almost tasteless pizza? If that is the case, I won't shop there no more.