3-4 weeks to allocate a payment

Having received an sms from Foschini group to say my account is in arrear I phoned the collections department to inform them that the account was in fact paid timeously. I e-mailed a proof of payment that was made on the 25 March to the collections dept on the 16th of April and was told that a note would be made against the account and the credit would be processed in a few days. 4 days later I received another 2 text messages and phoned them again and was reassured again that a note would be made against the account and that a credit would be passed shortly. Today I received and e-mail scolding me for being such a bad customer and not paying my account. Once again I called and was told by the supervisor Mr Gerard Beukes that it would take 3-4 WEEKS to locate the funds and credit my account at which point I threatened to close the account. Mr Beukes did not seem the least bit phased and proceeded to give detailed instructions of exactly how I should go about closing my account at any branch that was convenient for me. I am gob smacked!!! I have never had to deal with such an inefficient system or group of people.