Cancelled contract

After waiting ages for my contract to be cancelled it was finally done yesterday (with no notification or call I might add) and despite asking for my number to be put onto pre-paid the number has been cancelled completely so I have to get a new number even though I paid a lot of money for this one over the past 2 years. Furthermore I received an sms on the 18th of November to say I will be credited for this months extremely high bill and when I spoke to an agent earlier she said there is no credit on my account. I would ask someone to call me about this but I have no number anymore!