BAD RECEPTION AT ALL TIMES FOR 3 WEEKS

I have been using an internet ****le from MTN and the reception and network was fine until 3 weeks ago. I cannot get good quality signal or consistent speeds. it jumps from edge to gprs then next second no signal at all for 5 seconds then 1 bar again on edge for 4 seconds and so on. I'm struggling to do a simple google search. I have called all departments possible and explained my problem, the relevant department did escalate the issue. I have since then once or twice a week called in to report that my problem persists and nothing has happened or gotten better, the settings on my device is 100% correct as it works at full HSDPA+ as soon as I use it where it connects to another tower. The Rustenburg tower is broken or faulty and MTN does not do anything about it.