Bad service

The customer service of Vodacom is very bad. I received my invoice and noticed that I'm being charged for three data contracts, but I only have 2 routers in my possession. I contacted them to query this and I was just told yes you have three data contracts. The Iast one was took out in November 2019. I told them to my knowledge i don't recall this at all. Nothing was delivered to me nor did I sign any contract at a store for the third data contract. I requested the recorded telephone call where I confirmed that I accepted the contract, a person by the name of Pearl in the call centre ask me to hold while they ask for permission, then informed me that they will phone me back with feedback and that was on Monday 25/05/2020 . I received no call, I phoned Tuesday 26/05/2020 asked to speak to Pearl I was informed that Pearl is busy but will phone me back as soon he is done, still no call back. I'm paying for something I never signed or agreed to and I need Vodacom to resolve this matter urgently.