So basically I purchased tickets for the game on Wednesday through a resale site. I wanted to check they were legitimate so rang Arsenal's box office to check the numbers on the tickets, she said they were legitimate tickets but grilled me about where I bought them and said they could be cancelled at any minute but right now they look fine. She went onto say bring proof of purchase and ID incase you don't get in so you can go to the box office and possibly sort it on the match day. I'm now getting paranoid that they'll cancel my tickets and make them available for purchase again. Is this a thing? What are the chances I don't get in? Sorry if this is the wrong place for this post.