Bad service

I app**** for retrenchment cover with vodacom and they never got back to me. Recieved a letter to pay within 21 days or they hand me over. Went to store asked to cancel said i must pay the amount due to be able to cancel and i did. Sent proof of payment to cancelations as i was requested to do by store and now instead of cancelation they debiting again monthly charges. Whats wrong with you guys. I don't work you didnt cover my retrenchment i paid up the account as per letter and store n2 city sent proof of payments bank account closed due to no funds coming in yet you guys start charging again like the contract is reinstated. I refuse to have dealings with vodacom they have a loss of income benefit that they don't adhere to.