Triple debited after cancelation

Good morning I have canceled my vodacom data contract on the 1st November and when I was debited they had debited me 3 times the amount of what my contract was so I had contacted them on the 30th November and laid a complaint and I was told I will receive my refund in 7 days time it's now gone a month and I still haven't received my refund and I have contacted them which there services suck so badly they keep transferring you to all different departments and don't wanna allow you to speak to the manager, 1 star is still to much to rate this service they don't even deserve it as they are of no help at all they are rogues