Dishonesty

I have a contract with MTN, which consist of minutes and data. My details were given to a third party company named redcon which works with MTN. I received a call from one of their agents on the 04/04/2025 stating that since I have a 16promax contract with MTN as their reward department they would like to change the minutes and data deal I currently for a home router. I explicitly asked the agent whether will this be provided at an additional cost and she assured me that they will simply discontinue my existing data and minutes for the home router then I agreed. She told me that a mandate will be sent to me to approve it on my banking and I disagreed because what is the reason for new mandate whereas it is simply change of data to home WiFi at the same price as the agent said. To my surprise I receive my MTN bill and a new line was added for the WiFi at additional cost, I called MTN and they said they cannot assist me because it was redcon that assisted me not them. I call redcon on the 05/05/2925 requesting for a cancellation and the call recording as the agent **** to me to meet her target,I have been sent pilar to post by both MTN and redcon. I call them daily requesting feedback from the call recording they claim the IT department has difficulty retrieving the call however should I be the one not paying my contract call recordings would be retrieved in a split second but because I the client is complaining they are not taking me serious. I have sent email to mondo the supposedly complaints department as well as MTN complaints department I have not received any response from both parties. I am highly disappointed because my account will be debited to an amount I never gave consent to.