Absolute worst service ever

I have 2 contracts with you guys and one prepaid number. My prepaid is my blackberry and the one contract is a top up service. For the past couple of months I have noticed that no matter what amount I put into my BB number,my money is eaten within days, which has never been the case before. So this month, I decided to transfer some of my own money(from the pre paid to the top up) to ensure,my money doesn't disappear again. All good and fine,today I needed to transfer some of that exact same money,back to myself,. to send 1 sms to my credit card company and it ISN\T ALLOWED???Whose money is this to start off with