Rain cannon deliver service, cannot cancel a subscription and is avoiding refunding for non service

In January I ordered a Rain service. The 5 G modem device was delivered promptly and my Credit card was charged. The connection is mostly 0, zero Bit/sec download. I.e there is no service in this area, although when ordering, the service was said to be installed in the area. I asked for a cancellation and refund. this was ignored, .When calling, a friendly voice will tell me that all lines are busy, please leave a number and Rain will call back. They did not. I kept calling and asking for callbacks. I received a call from a fellow based in India. Difficult to understand, but he was super apologetic friendly, and helpful. Promised to have the subscription canceled and the refunds processed. Nothing happened. The credit card was debited again. Repeated emails went unanswered. support @ rain.com.co.za is an unattended mail. In summary, it is now July, I have been asking for a cancellation and refund continuously. 6 months later and Rain is still avoiding canceling the service and refunding me. All friendly assurances to cancel and refund are empty words. I advise people to avoid engaging with this company.