Horrible customer service

This is the 3rd time I'm complaining about Vodacom. Someone from Vodacom phoned me after the 2nd complaint and told me my issue is resolved. Vodacom owes me three months of fibre that they kept on billing me after my contract was cancelled. The contract was on a month to month basis. The 24 months was over. I phoned today and ask why the credit don't show on my statement and the lady told me only one month's credit was approved. No one even bothered to phoned me and explain. I will never do another wifi contract with Vodacom again. As soon as my other contracts expire, I'm going to cancel them all.