Supersonic Worst Products and Service

Supersonic offers the worst service ever experienced. I have been trying to activate my LTE Sim card, it has been 4 days and there no success. One of the major issues that it is about impossible to get hold of the support team. First time trying to get Support on Whatsapp, it took 24 hours for anyone to respond. When someone finally responded, they gave me less than a minute to reply, and then abruptly shut down the chat. I tried logging tickets via the website – 3 days later and no response. Then I paid R298 for the activation, prorata etc. They send me an invoice for only R195.29 and now say that I owe R95.29. I logged another ticket, still no response. I really want to cancel the service and look for a new provider, but I am not confident that I will get my money back or that they will stop billing me.