Worst car buying experience ever. I purchased a ve...

Worst car buying experience ever. I purchased a vehicle with ac issues and transmission problems. After coming back 3 times tgey finally repaired ac only then to find out I needrd a new transmission. I has the car less than 30 days at that point. I returned the car after being told they woukd repair it only to have it returned with the same issue. Now it seems as though noone knows me at the dealership. I have been shuffled from person to person only to now being told to contact a Nissan dealership since I have the extended warranty. Also after receiving paperwork from the finance company I then realize the car is being sold for much more than I was told. Now im sruck with a high car note on a vehicle that needs repairs and apparently it's noones problem but mine