I think your being snowed by Koodo. Not the first time I have heard of this, had this issue when trying to leave rogers many years ago. Legally speaking companies can't share user information without your premission even if they are owned by the same parent company. and rarely do companies pass money between each other.
Also usually they are in the computer system for 1-2 years before being back filed. So just because your acct is closed doesnt mean they can't go get the records.
Another thought too, is check koodo's service agreement. I know when I left freedom mobile last night I was reminded that "pay before accts" are not offered refunds for credits on file. Not sure how Koodo works, but its possible the customer service person just didn't want to have that discussion so s/he passed it on to someone else.
I've spent more time then I want to admit learning call centers ways of working. Spent some time in one myself. I would call them back simply say you would like to clearify some details on your acct and you can wait till they pull up your account. After they have confirmed they can see your acct and gone through the verification process, dont mention anything about leaving the company, just go straight into asking why you have not been issued a refund to your credit card for the November services. If your told it was credited back, which is what you are seeing, mention the account was closed at such and such date. At this point if its still an issue ask to speak with a supervisor. Use the word "supervisor" or you will be passed around the call center to different agents who really can't help you.
