Vodacom is the worst

My name is Ervan and I have the worst experience ever with vodacom. In October 2020 my 2yr phone contract was suppose to expire but then they phoned me in May 2020 and offered me an upgrade on my existing account, which I took but then the started charging me for both contracts. When I phoned them they said but this is ywo different contracts as it has 2differnt numbers, which I accept but as the time started getting closer for the one contract to expire I phoned them numerous times to cancel the contract but they just keep deducting the amount for both contracts. The end of November 2020 I went t o my bank explain to them what happen I even went to a vodacom walk in center but they also couldn't help me just kept giving me the call center number, I instruct the bank to reverse the money and I start paying them through my banking app since, but now they gave my details to the credit bureau saying that I didn't paid them, but I've been paying them every month. When I went into the store they told me the first contract was only canceled in December 2020 now whose fault is that. They also blocked my phone I can't make any phone calls and I do have the proof of payment, when I went in and show them they said I paid it into the wrong account again whose fault it that, they just told me I can pay ii on the app using my phone number as ref. Worst service ever