ceased my numbers

i was advised that if I don't cancel the contract on its due it shall continue billing me on a monthly basis, so I went to the store and cancelled it. now my number says it doesn't exist, along with my minutes and data, when I enquire they telling me I should have told them to convert it to prepaid, and I believe that's the information they need to make me aware of, because cancelling the contract by default I thought it means I will now load data manually, but they chose to cease my number phone, to which I receive important calls and wanted to keep. <br> only a few hours ago when I check in with the store they tell me I should have told them to covert it, how could I have know? this is new to me. they should have communicated with me to say you will loose your number, minutes and data of which I bought aside from contract benefit.<br> I have been a loyal customer for the past 24month, I don't deserve such a treat and I am claiming my phone number back because without them things are getting ugly by a minute. I feel so disappointed about this, seriously. because that's not a way you treat customers.