Poor service from vodacom fibre

So 2 months ago i decided that its time for an upgrade on my 50/50 fibre line.I contact vodacom fibre and within 2 days its upgraded problem is that since i have upgraded i have not had 1 day of stable 100/100 Fibre.i have phoned,i have emailed and no response on my problem. Sent another email that states that if its not rectified within 48 hours im canceling the contract.Sick and tired of this ass licking the whole time.Come debit order date they take your money regardless.If you dont pay you get blacklisted but they dont need to provide what the contract says.Thats pretty much ****************