cant find payments made even with proof of payment

I am so tired of being cut off and getting told i have not paid my account. I have sent numerous proof of payments to differnt agents and then get told i must pay the account again which is ******** why must i pay twice for something and also i get charged for reconnection every week , why must i pay for something thats not my fault, so i have my proof of payment and multichoice saying they havent received it so maybe its a case of theft