Telus Bill/Cancelled Service

I cancelled my Telus Account by telephone on May 19/26.  (Agent-Abdul)  Abdul informed me that because my home telephone # was being ported, the Telus account couldn't be cancelled until the porting took place.  The porting occurred on May 26/26.  Later, that same day, I returned the equipment via Canada Post-tracking #4000477736315995.  You can imagine my surprise when I received a bill for Telus services this evening for the month of June ($316.47).   I would like to be assured by email that this is incorrect and that there is a 0 balance on my account.