I bought a smoothing bodysuit to wear under a clingy dress yesterday. Tried it on in the changing rooms and it fits fine. Had it on last night for about 6 hours and it was so incredibly painful by the time I got home. Just woken up and I still have red marks from where it was digging in at the top of the cups. I'll never be able to wear it again - do you think m&s would allow a refund? I had some new shoes I wore for a night out that gave me awful blisters and I was offered a full refund from a different retailer for them so it's not unheard of for shops to accept returns for items that are so poorly designed they cause pain to wear them.