CHARGED FOR A WRONG WIFI AND NO REFUND DONE

December and January they billed me R520 for both months without my consent, their reason was that their systems were faulty. i reported this in February and stopped paying as i wanted a refund as i have singed for a R399 wifi. everytime i log on to thier whatsapp customer enquiries i have to get connected to a different agent and have to repeat my story to each ana every one of them, however i got hold of Sisanda who told me that i will get my refund of R121*2 but no refund was done and i contacted them last week to check what has happed and was connect to Mbali who told me that the refund failed die to my banking details which they have on their systems as i was debited every month and asked for my banking details and the communication got cut off because its a whatsapp not a telephonic one, i has to get to log go back to enquiries and get connected to agent Jared who was not helpful and asked for my bank statement to verify how the amount got debited onto my account which did not make sense to me as they have every record on their systems, all the agents i have been communicating with they were able to check on their systems but Jared could not check. he told me that he is going to a meeting and will contact me when he is done, till today i have been waiting and no refund.