Paying for months with no wifi service and refund

We've been experiencing problems with wifi, where we weren't picking up signal, because of talks about Telkom signal is poor. I've been paying R400 per month and it's come to such a frustrating point where it's pointless paying for nothing with no service!!!! After complaining to Telkom in Beginning of June for a refund, was told it would take 7 days to be refunded, after numerous frustrating calls, my last call being 25 June I was told refund was rejected, havent been given a reason, & initially the agent said no refund was requested, told her I did request as it's frustrating to pay for months and not receive wifi, she said she will get the manager to call, I haven't received any calls!!! Telkom is the worst service provider, they dont take customers seriously!!! BEEN PAYING FOR NOTHING!!!