Unresolved query

I'm so disappointed and annoyed at the same time, I have an unresolved query since June up to date. Vodacom activated an insurance policy on my account without my concern when I found out and requested cancelation they do it for few hours nd reactivate again I've been trying to resolve this since then but no luck and it affect me because they end up closing my phones because of outstanding amounts of that insurance, I don't know what to do with this and now they even block my prepaid number that I'm using to contact them. Anyone who can assist