Vodacom "Pay for your ******* contract"

After both my ID and banking details were ****** to open a contract at Vodacom - their feedback is as below: The query is not ***** related as it was a sales dispute. The device was returned but not cancelled and therefore not ***** related. Since then, the ticket has been closed however I am getting daily calls and messages from MBD demanding money for an unpaid contract. I am completely dumbfounded by the terrible service received from Vodacom and how they are crippling my credit with their uselessness.