Pathetic Service from vodacom

So I called vodacom to cancel my data sim because their network is horrible, one of the cancelations consultant just brushed me off and told me I can't cancel because the contract is new. My question is if I pay you and you don't deliver I have to be stuck with you because you don't want to lose clients. If you don't want to lose clients teach your agents good service and fix your network glitches that way you will avoid churn not to hold clients hostage. Pathetic service indeed.