8 MONTHS OF NO HELP!!!!

I took a contract with telkmo in February 2018, I went in for an early upgrade in January this year. Ever since I did the upgrade they keep suspending my line EVERY MONTH SINCE JANUARY. I have to make calls and they can't explain why it's happening, they keep telling me that they will escalate the matter to their collections department but it still keeps happening. This month they SUSPENDED MY LINE TWICE!! Still no one can explain why, the manager has promised to resolve the problem but STILL!!!!!!