Upgraded 3 times and still havin isssues.

I was on the R479 deal , it was working connecting 4 devices at the rate of 20mbs, few months later, it was throttled to 5 mb/s. I upgraded to the R500, the speen was up 26mb/s on a good day, few months later same thing happened m throttled to 10mb/s. I then upgrade to the R700, the speed was up 40-50 mb/s , after my first debit order it went back to 18mb/s. I work from home , i then get paid, then i pay for Rain data. If I dont have access to internet , i dont get paid , there fore unable to pay Rain , there fore leadin to unemployement then cancellation of the Rain services. Lets not blame loadshedding, other providers are working just fine and you are able to still debit thru the loadshedding