BUSINESSES "*****ING" FROM CUSTOMERS

I recently upgraded my Cell C contract through Glocell. When I upgraded, the consultant told me that I had a once of fee of R300 that I needed to pay end of June 2018. I then paid this. End of July 2018, the amount of R307.17 was deducted against my account. I phoned Glocell who told me to take it up with Cell C, then I phoned Cell C who told me sorry I am still paying for my old contract as well as my new contract. This is the first time in all the years I have had my contract with Cell C that I pay for an old as well as new contract when I have upgraded. This month again, they deducted R303.38 and my agreed payment amount is R179 so meaning it is double the amount being deducted from my account. I RECEIVED NO HELP FROM CELL C OR GLOCELL to resolve this matter and will NEVER EVER refer anyone to Glocell or Cell C as a network provider. It is theft and they are just pulling up their shoulders. I honestly feel that I want to obtain Legal Advice and take them on!!