Bound to a cell c contract with my knowledge

Had a contract with cell c .when it was time to upgrade I opted not 2 .I called cell c customer care last year September 2021 and advised them that I'm not ready to upgrade .the sales lady put me on a month to month top up .2 weeks ago I was contemplating upgrading was doing some enquring only to find out they bound me to a contract with 25 months more to go .I went back n forth n was told I will be called back with no joy .called at westwood store n requested to speak to manager a sales lady refused for me to speak to one n told me she cannot help and I should call customer care again .called customer care again n they asked me to call on a store n request a recording tht I didn't accept the contract .this went back n forth.then they asked me to call retention department they only can help .as usual. I spoke to Nqobiae Dhlamini clerk who asked me to go back to a branch .I asked to speak to her manager Michael makuhubela n was told via an email will be contacted within 24 to 48 hours .as usual no joy no call or resolution. The service from cell c customer service from inception of my query was pathetic