very unhappy

Good day, Please assist with me with the below complaint. I called the call Centre to request a settlement letter and spoke to Ryan who provided me with a settlement letter for an amount of R4840.77. I have called the call Centre many times and went to the old mutual branch at Eastrand Mall to advise that when you guys debit my account it returns hence I make cash payments yet you guys till debit my account after I advised. The one loan gets debited on the 19th of every month yet my pay date is the 20th.I paid the settlement and called the call Centre and spoke to Angela requesting a paid up letter which I've attached. I called yesterday and requesting a paid up letter and was asked which paid up letter do I need as both my loans are settled I then advised for which account I required the paid up letter. To my surprise yesterday when I went into the branch in Alberton (very unhelpful manager) and I was told that one of my accounts is in arrears. The consultant advised that the debit order reversed on the 26th yet the paid up letter I received was on the 26th and I called the call Centre yesterday and was advised that both my accounts is settled. Your calls are recorded please liste