Me and my friend quit playing WoW ~2 years ago, but now we're starting it again. We wanted to buy the full WoW collection for his (new) account on the last day of the discount period, but since we moved abroad recently, the transaction failed because the credit card from his old country still had the old address registered, not the new one (which is registered to his battle-net account). We immediately rushed the bank here where we live and deposited money to our account, but when we arrived home, the discount was no more. There are registered payment attempts on his account which occurred during the discount period, so it wasn't really our fault. We have contacted the account & billing support line therefore with this issue, and one of the employees said that I shall find a thread here in this section of the forum, related to the issue since there were a tons of players already requesting the company to extend the period (he also said, that blizzard is thinking about it). I couldn't find such a thread yet, so I just created one.

TL;DR -> If you are up for extending the 50% discount period for buying all the World of Warcraft games, please write in this thread