Service unfairness of African Bank

Please could you help Peter. I have a loan with African bank whereby I had to make a payment arrangement due to personal and financial circumstances. The payment arrangement was put in place and everyone was happy. But know they call me about plus minus 8 times a day telling me about the outstanding account and the payment. They deducted the full instalment from my account after i made the payment arragement and that cost me to call them. I spoke to the consultant and told explained to her again everything. Super my payment arrangement amount was notes again. Now this month again they deducted the full instalment again after calling me how many time. I spoke to one of the consultants again today explaining everything all over again. I just think this is not fair and the customer service is unexceptable and not up to standard. Why do they record the phone calls and make notes on the account. Just for nothing. I requested for my funds to be reversed back into my account and still nothing received. I will never recomend this bank to anybody.