Very bad customer service

My experience with Mobicred has definitely been an unpleasant one. I paid the balance due as stated on their statement. I am aware that the account was in arrears but I settled the balance on the account. They also acknowledged receipt of my proof of payment. However subsequently they handed me over to their debt collection department and since I have been harassed by numerous calls, text messages and emails despite the fact that I am explaining to them that the account is paid and that they should update their records. Their customer service is ridiculous and I will definitely report them to the NCR!