MWEB bad service

I signed up a few months ago with Mweb Cell C LTE, which initially ran at ave of 6mbps, which i was ok with. In July there was a case where there was a general problem where the lights on the router was flashing between yellow& blue but no internet for a few days. Thereafter it started struggling to run even at 1mbps. It is now consistently struggling to run & i cannot stream anything. I contacted Mweb & they are just saying that Cell C is looking into it. Since i contacted Mweb last Friday, Cell C or Mweb have not called me once with any feedback. Paying R845pm for LTE with nothing in return...this is legalised theft