Ridiculous bank - Their numbers don't add up

I'm writing this review as a very disappointed and frustrated client. I have a credit card with African Bank and my account was in arrears. I have been paying my account installment in full plus an additional R1000 every month on the 15th. As i was serious about paying my debts i started monitoring my account and i would notice a decline in the amount owing to African Bank. This was until my arrears amounted to R2464 after paying my March installment plus an additional R1000. Then an african bank consultant called me on the 21st March and advised that my outstanding balance is now R2464 and i need to pay it in order to settle my arrears. Two weeks later i call the bank to notify them that i'm ready to settle with an additional amount R2464. To my surprise my the amount owing has now gone up to R3700. When i ask them how it got to R3700 no one is able to answer me instead i am being sent from pillar to post. I also when to the Branch in Ghandi Square they also cannot explain it. They logged a quarry on their system on Friday 5 April and promised to call me back within within 48Hours and three days later i am still waiting for their call. I told them i have statements that i downloaded from my internet banking app that proves everything but no one seems to have an email address. Yesterday i paid R2600 and my arrears are still R3700 this bank is ridiculous.