Rain is the work internet provide

Rain Internet Service Provider is the worst network ever, cancelled subscription in August to date they still deduct for the service i don't use . you try contacting them on *** they never available to take calls. was on R600 package now since i cancelled the debit order deduct R958 for what? The last time I spoke to someone there was cancelling the deal and could not explain why i was suppose to pay R958. I want my refund and cancel and terminate this contract it is of no use to me as its always offline most of the time without fail.