Tried to cash out winning bet at kiosk inside inside Emirates Stadium from previous game (bet placed at same kiosk), only to be told the teller wasn't trained to pay out! Informed that I could collect winnings at next home game. Next game I am told the coupon is too old (4 weeks)! Can't find a shop within 10 miles and don't want to give my personal details to a website account. Don't bet within the stadium.