www.enterthevault.com — Wasn't able to reach customer service
I don't recommend using EnterTheVault, it's impossible to contact them and get help. I had two VIP tickets, but unfortunately my friend wasn't able to come, but gladly I found someone else who decided to go and watch the show with me.
But first we had to change the name, and since our tickets were VIP there was a possibility to do that.
So I contacted EnterTheVault by sending them a message, I explained in details what actually happened and was expecting to get some help, but they never replied. I sent a lot of messages, but all were ignored, EnterTheVault never bothered to reply.