Business ProfileforCadillac of South Charlotte

I called Cadillac of South Charlotte for a code that I was getting on my Cadillac escalade . I spoke with ****** and he assured me in his own words 98% sure it is covered under your powertrain warranty. I asked him if it wasnt covered, would I be charged anything? He said I would only be charged $189 for a diagnostic. I agreed and took my truck in to them on Thursday, January 25th for a diagnostic report. ****** went out to my truck, came back in and grabbed a paper that printed and told me it was fuel intake cylinder 8 and that it was covered under my powertrain warranty. I said thank God, another mechanic wanted to charge me $4500 to fix that code. On Monday January 29th I get a text with a link to approve work. It was the cylinder that needed to be replaced , an air filter and a fuel system service. The only two items requesting approval were the air filter and the fuel system service. The cylinder replacement had been approved by them . I approved those two items for a total of $488.96 and signed. On Tuesday I get a text that my truck is ready for pickup. On Wednesday morning I get a call from ****** stating that they made a mistake and my fuel injector cylinder was not covered under warranty and I now need to pay $1520.17 and if I cannot pay that, they will remove the cylinder and put back the faulty one. After I havent had a car for going on a week. I call the manager and he says the same and in his words we cant just give you the part and labor for free. According to them it took 5.5 hrs to replace. So they would rather pay another 5.5 hours of labor to remove the part AND have an unhappy customer. ** law states they may not exceed the cost I authorized by more than 10%.