Contract dispute

Good day

I am writing this letter to express my dissatisfaction about the contract I was mislead into signing by Hyundai East Rand representative(Thabani Mtolo). Almost a year ago I purchased Hyundai grand I10 motion, and upon my purchase I was very specific and had requested my premiums to be fixed for the duration of the contract. The consultant, Thabani Mtolo assured me that my premiums and contract will remain fixed as discussed; after receiving my contract I then stipulated my concerns with the amounts that differed from our discussion, but he kept reassuring me that everything I had requested will be as per discussed. Months went by and the amounts were as discussed yet, and I was very delighted that despite my scepticism all is in order. A few days ago, to my surprise I received an SMS informing me that my premiums will go up in 60 days as per the terms and conditions of step payment which was never explained to me in the inception of the contract.

To this day i am still not resolved , the dealership keeps sending me from pillar to post with their empty promises .i would like this resolved ASAp