Horrible customer service , dodges customer refunds

I signed up for the FLTE service and made payment on 23 January , I was assured I would receive sim an router within 5 days, Only received this on 5th February after numerous calls and dropped chats on the whatsapp portal. They assured me that I would be billed pro rata when I enquired as to late delivery (2 weeks). On the 25th February NOT only did this not happened but I was in fact DOUBLE billed. Package being R999 and my account being debited for R1986!!!! Naturally I called them the next day (26th) and was informed that a refund would be processed. Next week I was told I would receive feedback by Friday. After the 5th call I am still waiting for this refund or even a callback, sms or email from Supersonic to update on the progress or explain what could have gone wrong. I had previously had a Fibre account with this company and was fully aware of the ********** customer service but has honestly expected an improvement by now. (UPDATE) It has now been 3 months , and I have been through the ringer with this company. I was repeatedly promise a refund and more than once told that it had in fact been processed ( was even told to expect funds in my account last Friday) This has NOT happened ,and agent even tried to tell me today that no error was made and that I will not be receiving my money back! After 3 months of promises to the contrary! Needless to say this will be my last month with this dishonest, incompentent provider and will be taking my business elsewhere. My advice? Avoid this company like the plague!