Life cover cancellation poor service

I called momentum today to cancel my life cover which would cover my bond should I die or become disabled. I spoke to a consultant who asked me a lot of questions and also mentioned that she cannot cancel the policy without getting consent from the other person who is also covered on the same plan , I said she can call the person and obtain consent thereafter she must cancel the policy but that didn't happen. I am the premium payer and have every right to cancel the policy as and when I want to do so. I sold my house and sont need this cover anymore but I'm being sent from pillar to post which is unfair because I have been paying my premiums without a fail. I want my policy to be cancelled asap or else I will take this matter to the ombudsman as I know my rights as a client. I will never do business with momentum again.