Best to send a private message to the Moderator Team, and use that same screenshot. They should be able to resolve it for you. It's been my experience that their responses are quite prompt in the same day!
It can be hit and miss with Walmart, depending on which one. There is a sole one not far from where I live, and sometimes, my experiences there have been mixed, depending on the situation and my reasons for going.
Walmart is NOT the place to go. The staff aren't always properly trained in terms of proper customer service. Go to London Drugs, and you'll find more knowledgable and caring staff! They will help you port your number over to PM!
London Drugs is THE place to go to port your number over to PM! Their customer service will be cordial and they will walk you through the steps and have your back!