Bad network provider ripping people s money

MTN bad network provider , I took contract with MTN that ended in January 2024 , MTN agents called me for an uprade I told them I don’t know wanna upgrade contract an can they cancel contract we agree, I was told about 30 Day notice, wow how am supposed to serve a notice for contract that ended already? 2 months now still they debiting my money , this is ripp off I will never ever take anything from MTN 🤞