Well, I'm from Spain too. I booked my tickets for the Wembley Arena Coldplay concert on September 19th from gigsandtours.com (seetickets.com) The payment is correct but now I'm unsure about how and when they will send my tickets because my adress was incomplete at the order tracker. I tried to ask them about correcting the error but they are not replying my emails.
I don't know what to do, I need to get my tickets as soon as possible to make plans, you know, flights, hotel... and I would like to be sure of getting my tickets! :\