@Jezzcanada
The only possible concern in not removing the auto-pay prior to porting out might be if your Public Mobile renewal was scheduled to occur within a day or so of porting out to another provider.
If that wasn't the case, you need not be concerned.
Worst case, check your credit card statement after the next expected PM renewal date and let the CSA's know about it (after the fact), and you'll be eligible for a refund.
