Increased balance of account and interest rates charged abnormally.

I am experiencing a very bad customer service with Absa vehicle finance. In March 2020, I got a payment relief message offer, I then accepted the offer. I was effected from April to June 2020. In July 2020, I then had to resume payments, surprisingly the monthly installment had increased. On enquiry, I was taken from pillar to post, at times my calls were just dropped while still holding. A week later, I found a consultant who told me that it was because of the payment relief but I explained that I never received any communication with regards to that. I was then told it will be fixed. A month later, August, I got a statement indicating that the monthly installment was fixed and went back to the normal amount but then again there was now a drastic increase on the total outstanding balance. I had to enquire again, still I couldn't be assisted when calling, I was transferred to different departments without any help and the worse part no one had answers as to what happened. Up to date I am still not assisted and the total outstanding still reflects the same increase. This is unfair to me as I now have to pay an amount that just came out of nowhere.