Worse service from Mweb and Vumatel

Struggling 3 month with Mweb and Vumatel, i pay mweb R1600 for a 1gig download fibre line, line speeds range between 100mb and 250mb download, its been an on going struggle for 3 months, its the same thing over and over. Mweb arranges vumatel to inspect problem, vumatel technician comes out, inspect my equipment and line on my property, they tell me all my equipment is working 100%, (spend alot of money on the equipment to make sure all is good for a 1gig line) technician then say there is a port or conjuction problem. The vumatel technician go, after 3 day plus minus tell Mweb is has been resolved, mweb phones me and ask if problem is fix, i check the line, and tell them no, still getting slow speeds of +-150mb. Then mweb phones vumatel and the cycle restart again, this has been done for more then 5 times. Now they say the DFO has to resolve the problem, been waiting again for more then 3 weeks with no results. They quick to debit order the full amount for a 1gig line. But cant resolve problem. Worse service ever from Mweb and Vumatel.