Very poor customer service from Supersonic

I ordered an LTE service in Jan 2021. Made the upfront payment of R199 as required. I heard nothing from Supersonic until June/July 2021. My bank account was debited R199 twice before a modem was delivered, so paid for a service I could not access. I requested a refund and it has been months and still no refund.

Modem was only delivered in October. I was debited an additional amount of R365 which no one at Supersonic could explain to me. I am spending a lot on airtime to get my issues resolved. Customer service agents promise to call back but don't. Can somebody more knowledgeable assist.

I am told that there are two accounts under my name on the system one of which is suspended. My delivered and active sim is : *** , I am using a tp-link modem.

I can not get the modem to work for 24hrs straight. I need to reboot the modem to get internet connectivity as advised by the service consultants but no one can explain why this should be the case! I have spoken to about 20 service consultants including somebody from PMO. I wonder if this is common for supersonic customers or mine is an odd case?