Mavis Discount Tire

this the 2nd time this location has over charged me first time one my f 250 then said they would give me a free oil change well a week later they changed there name to Mavis discount tires this time I tell he service tech to put reg oil in the car that is what the oil cap reads in English so I did not go to pick it up and they charged my wife for a synthetics oil change against the direction and the oil cap