After a month still no refund

Telkom owes me money. I went to the Telkom branch in Cresta to resolve. They told me they can't assist and logged a case. This was 13th of October. They phoned me to tell me they will call back in the week to get my banking details. Did not receive a call from them. I called in on the 27 of October. They logged a new case. Told me they will call me in a week's time to get my banking details from me. Still no call. I called on the 7th of November. They told me the case that was logged on the 27th of October was closed. Can't give me a reason why. First call still open but because there is not enough info logged they can't assist. So still no resolve. They logged a new case yet again. Case was logged on 7th of November. Phoned again on the 14th of November to get feedback seeing that is has been a month since my first call. Now they tell me the last case has a turnaround time of 72 hours and that time has not passed. So after a month, 3 case numbers, Telkom can't just phone me to get my banking details to refund me. Why can't I just call in and give my banking details. SO after I went to the shop, called in 4 times, logged 3 cases, my problem is still not solved. I'll never do business with Telkom ever again.