Extremely bad service

I have been a vodacom user for more than 10 years, although I would experience a few hiccups here and there, nothing to the magnitude of my experience with Mtn. I recently (3months) activated a new mtn SIM card for work purposes, I told the lady at Pepcell diepkloof that I would only be using this SIM card once a month in order to get paid from my employment. I later then decided to start using the SIM card on the 31st of July full time, made numerous calls on the day so much that I had to recharge twice in the very same day. A week later my phone had lost network and a week later completely didn't work at all. For two weeks I have been running around like a headless chicken attempting to find out what the problem is, trying do a simswap and only speaking to Mtn staff that obviously dont know customer service at all nor do they know their jobs. After calling 173 for the umpteenth time I was told that my SIM card was deactivated on the 6th of August, literally 6 days after I used full time. When I had received the number it already had a whatsapp acc and now when I call it Glen picks up. My livelihood depends on me receiving messages to access my income through this number only