Toyota bidvest gezina

If I knew I wouldn't have bought my car at Toyota bidvest gezina.....due to been desparate to get a car...was ******* into buying a car that was 159k but on the signing day it was R190k after being approved...ok I tried to negotiate the interest rate @15% but no luck Nd was threatened they would cancel the contract then they added bidvest tracker all those things regardless of me not wanting them...so I took it paid the instalment more hoping to finish it quicker...on a fixed rate with no balloon...then comes covid...took the relief for 3months as was told 3months will be added ok cool...nou they increased my instalment by R400 plus 3months via covid..I tried to renegotiate Nd am told I signed I signed only them can recalculate it.....after all most 3years with them...after they increased my instalment I get a call from bidvest tracker saying I must pay more as my 2years has passed....who pays for corolla 1.6 at R4600p/m excluding insurance during covid.....am looking for a bank that can give me a better interest rate just to partway with Toyota bidvest gezina....I don't mind restarting my contract as long as it's not with Toyota mcathy bidvest gezina... clearly it's not for all of us!!!