MWEB, WORST FIBRE EVER AND POOR SERVICE

I am ever so disappointed that I went over to Mweb fibre. I have a 200/100Mbps line which only worked for 2 months, now I cannot even stream dstv. I get terrible speeds from 1/50Mbps to 26/60Mbps. When trying to phone Mweb, you do not get hold of them and their are not responding to emails, nor phone you back. Is there a way I can cancel my contract, return the equipment and go to other SP, as they are not keep there end of the contract?