Vodacom poort service

I have been a client with vodacom for many years and the service I've received lately has been of utter disgrace. I have settled the contract in full and yet am still paying debit orders of full amount of a paid off contract. Customer care informed me that they wil reinburse me in 7-14 working days, which is unacceptable. This is poor admin and service as I have to suffer for something that's already paid off, I would recommend that no new client take out contracts with Vodacom.