The Brick review: not trusting 2

Last week I went to the Brick which is on the Eglinton and Pharmacy. Let me tell you the address of that place, so it's 20 ashtonbee Rd. Scarborough, ON. I was there on July 6, 2011 to buy Bed set and mattress, so I bought everything on that day and finish it with cash and everything. After 3 days they deliver it to my house. First it was mattress, so what happen it was like this when I receive the Mattress it wasn't the same as I chose it in the store, they brought for me different mattress not the same as I chose in that store The Brick. The mattress I chose it had more flowers on it and the colour around the flowers was blue, but the one they send it to me, the flowers were less that mine mattress and the colour around it was different than mine. The one the brought it it was grey colour around the flowers. I went today to the store to tell them that they send to us the wrong mattress, but they don't believe me and they didn't even do anything to help me. I had my mother with me and my sisters because on the day we bought that mattress they were with us. All of us saw that mattress with our eyes. The manager told us that we are wrong and we are lying to them. We didn't even open the mattress, it's still in those plastic bags. Can you tell me what should I do next? Also, at the end the manager told us that if we wanted to exchange it than we have to give them 250 for the charge. That is not fair because that is not our problem for the mistake that they made it. Today July 8th, 2011 I am very angry at them. Not even agree with them, it's their mistake.