Compliant - African Bank

Good day I paid off my credit card on the 24 April 2019 and received a settlement discount but still had tracer payment going off my bank account 25 April 2019. Referred to African Bank, was told that any tracer payment will be refunded. This was 26 April 2019. On the 25 May 2019 another payment of tracer went of my bank account. Called African bank, was told that any tracer payment will be refunded. This was 26 of May 2019. Kept on calling African Bank relating to the query. Then received a sms 04 June reading, sorry we cannot complete your request because bank charges do not reflect on bank statement. I have no idea what is going on, as the total of debit for tracer payment was 750.00. The bank charges that African Bank is claiming R750.00 after the account was paid off. Now I have to pray, that on the 25 of June 2019, no tracer payment must be debited from my bank account., otherwise I will have to pay for African Bank, bank charges. Called African Bank 07 June 2019 and spoke to the supervisor but no help.