Poor service by Fibrestream

Fibrestream SA is in a transition to mweb and they will be charging us more than what we have been paying. They are telling me I can't cancel subscription with them because they are in a transition period. They didn't give us a 30 days notice to make us aware of this transition to mweb. This is unfair to me and a bridge of the contract that I have signed with them. Fibrestream and Mweb =Tsotsis never ever subscribe to this nonsense!!