Did you ask for a PAC number? Or to port it?
They cant cancel your account if you ask for a PAC number and if you had called they would have told you that if you dnt port your account will continue as normal. They would then have called you 5 times over the next week trying to get you to stay!!!
The easiest thing to do would be to use your PAC number on a pay as you go SIM so you would only have to pay if you used it.
That PAC will have expired now