Vodacom bad service taking what dont belong to them

Issue with double payment. Im struggling to get them to pay the 1 payment back. Calls get dropped no feed back bad service, ive phoned 10 times different emails i get to sent proof of payment to and nothing everytime i have to phone in and check, then i get tell day waiting on proof of payment and whole lot of excuses im sick and tired feel like throwing my phone agains the wall. Vodacom i wont recommend any1 due to their bad service, bad service is to much of a nice way to describe them?. Y do i need to go back and forth for my own money and my account balance for up coming payment shows R16 which tells u that their was a double payment.!!!!!!!!