Pending Refund

i had a 2 years contract with Cell C legally, however after contract ended, Cell C continued debiting my account without prior authorization from me, they told me if i dont call to cancell the contract it automatically get reinstated however the tele markerter who called did not clarify that and it was evident from the recording they retrieved that i was in the right. one of their agent called and acknowledged that they are in the wrong, and a follow up email was sent to me with an instruction to send my 3 month banking statement so that they can process a refund they even supp**** me with a case number, its been 2 months now im not getting my refund and when i call im not getting any assistance and most of their customer care agents are rude and impatient with the clients.....Cell C its just a piece of work with poor service delivery and knows and understand nothing about customer satisfaction.