Vox bad service

We moved 3 months ago andeith the move we upgraded our account, canceled the old line and signed a new contract, my line speed is never what it's meant to be it's supposed to be 50 up and down, im lucky if I get what I pay for. Vox suspended my line because THEY didn't arrange for a courier to collect the old router, charging me thousands of Rands because of their fault, my account is up to date so there was no reason to suspend. I've spoken to a Reece, useless, then Forrest who was helpful in the beginning, then stopped helping, not to mention countless times I called and was on hold forever. They didn't close the previous account or transfer it now it's constant problems. I've tried everything and nothing has helped.