Mtn

About a month ago I got a call from an mtn sale person telling me that I can upgrade my phone but I told him that I can't cause I'm not permanent and he told me that he can't give me a package which is gonna work better than the one I have and it would be more or less the same amount and I asked him can I cancel when ever I wanted and he said yes but when my debit order went of it was more than he told me not only that I can't cancel the thing it would only end 2024 and I asked for the recording but with every sale person I talk to they give me a different story