From what I understand, the 1 time 5G addon has no experation date. You can use foreever until it runs out. But you can't change plans. If you change plans you lose the remaider of the 5G. I hope that answers your question.
I did go back to Wow Mobile Boutiq at Richmond Square and showed them the Promo from the forum. I have to give Tommy from Wow Mobile a shout out. He was great, he looked up my transaction (I didn't have a receipt) and refunded me and also gave me an...