General Motors review: Third party warranty coverage

This dealership works underhanded and doesn't make their customers happy. I purchased a car on 2/16/2024. The deal was good with the sales rep. When I had to get with finance manager I waited in his office for over 2 hours to get paperwork completed for financing as my new car waited outside his office. He proceeded to ask me about warranty coverage. He added the warranty charges to the price of the car and put the gap/warranty fees in other area of the finanancial contract. When I saw the warranty fees were over $11,000 when I got home I immediately contacted warranty company and cancelled 3 policies. The fourth policy had to be cancelled by the dealer. I requested that the car not be waxed. The car interior was treated before I committed to the extra coverage but not the exterior. I did not request the interior or exterior be applied treatment. I was not told that the interior was treated when car was delivered on 2/16/2024. When I asked dealer to contact eg assurance I was told it was a hard sale warranty and possibly couldn't be refunded. Eg assurance again told me to have dealer cancel warranty on my behalf. On 2/28/2024 I was told by finance manager that handled my deal that since interior of car was treated at a discount I couldn't get a refund. Only option was to return car which is now used for exterior treatment. I have never been double talked before about having a problem fixed. I never saw or received any paperwork about interior treatment for car. Finance guy said he received an email from detail shop manager about treatment but hasn't texted or forwarded it to me. When we spoke on 2/27/2024 I asked him for proof about the email from the detail shop. He said he would get everything together today. I live 450 miles from dealership. I cannot put those miles on a corvette z06. I have never been so disappointed with a new car sale. I will not recommend this dealership to anyone. As for the interior treatment that was applied to car I will never use the warranty or return to this dealership. I guess the finance manager wanted a nice commission for the warranty sales. Make things right and cancel policy or refund me of costs for the exterior treatment that was not done. If the detail shop hadn't put interior treatment on seats I would be in the clear. Finance manager acted like everything was correct and done