Worst customer service and no response to credit due

I placed an order for a fixed wireless deal on 22/11/17 and I received the router on 14/12/17. I waited 48 hours for the activation period then contacted accounts at Afrihost on 17/12/17 then 19/20/21 December & was told to cancel my subscription on 21/12/17 which i did the same day. After cancelling my subscription i was billed R299 on 02/01/18 and then put a stop order and sent an email notifying Afrihost. I then got a call from Steven at Afrihost who apologized for the poor customer support and made arrangements to collect the router and sim card. The router and sim card was collected and I contacted Steven a few days after that to confirm that he received it and he did and sent an email to accounts to credit me the sum of R462.97. I wanted to take a 4mb capped DSL combo with Afrihost but after the terrible service decided to take it with Axxess. I await an urgent response before I resort to other means to retrieve my money.

Any advise on how to retrieve my money would be appreciated.