Vodacom Fibre - unable to resolve problems

I have been struggling with poor connectivity for weeks now. I phone almost daily and sent multiple emails but nobody has contacted me yet with a solution. Vodacom I expect more from you. I am paying for a 10Mbps line but my connectivity is so poor that I am unable to use it. Today my measured speed is under 1 Mbps. Some the days the Speed test Ping time is 3290 ms and Jitter 3964ms The Support people are very friendly to talk to but cannot resolve anything.