Coggin Chevrolet at the Avenues

I bought my car from Coggin Chevrolet at the Avenues in Nov 2018. It had less than 6000 miles on it. I got a factory warranty of 30,000 miles and an extended warranty for about 1700.00. It was added to my car loan with an interest rate of 12.5%. The extended warranty was supposed to cover me till 106,000 miles. But in Dec 2021, I had to get my car fixed. I was told that my extended warranty had ended and I had to pay for it myself. I had only driven 71000 miles. I called the warranty company and they said Coggin had to fix it. But Coggin said they couldn't and would only pay me $250.00. I haven't got the payment yet, and it's been 3 weeks. I want them to fix their records and pay for my bill. I have more repairs that need to be done, and they're not covered. But they would be if they had done it right from the start. Also, my documents don't have my signature, but their documents do.