Am not paying anymore till am happy

So am like up to my eye ***** with standard bank, Renault South Africa and Renault Roodepoort.

I laid a complaint with standard bank regarding a vehicle I brought with their assistance. Then then took the matter further with the dealer to get it shorted.

I then received an email from the dealer saying that:: Renault Roodepoort and StandardBank are unable to assist me and that I should contact Renault South Africa. Which at that point I had already did. And their Response that: we supply the dealer with cars and what happens after that they have no control over it. Renault Roodepoort says: they will not swipe my car for a other one because they losing money, and it's not their fault that the new car they sold me is faulty. StandardBank responded to me saying: weather the car is faulty or not I still have to pay.

My response is: standard bank brought the car for me from the dealer. and now am supposed to pay them back with interest right... SO I HAVE DECIDED THAT I WILL NOT BUY STANDARDBANK UNTIL THIS MATTER IS SORTED OUT. BECAUSE NO ONE WANTS TO TAKE RESPONSIBILITY FOR THIS SITUATION. AND AM LEFT WITH A CAR THAT AM NOT SATISFIED WITH. A CAR THAT IS GIVING ME ISSUES LESS THAN A YEAR SINCE I HAVE OWNED IT. I CAN'T KEEP DOING THIS. ON TOP OF THAT I NEVER RECEIVED A CONTRACT YET AM MAKING PAYMENT TOWARDS SOMETHING THAT IS NOT BENEFICIAL TO ME OR MY FAMILY