So I had an armchair delivered by Argos today and having screwed the legs on it doesn't sit right on the floor. As you can see from the photo one of the legs sits about 1.5cm off the floor. I thought it might have been where the carpeted floor was uneven but having put it on the hard kitchen floor it's the same. Any ideas for how I should resolve it? Is it worth sending it back or do you think there's a simple way to rectify it myself?!