Rona, you can seek the reject the goods on the basis that the goods were not as described, but only where the description was a central element of your decision to go ahead with the purchase. However, unless you made it clear to them that you needed a light-weight sofa which could easily be moved, or asked them whether it was, they were under no obligation to inform you. They could argue that you had ample opportunity to examine the item in the shop before purchase. I would say broken fixings would not be reason enough to reject the goods, where SCS have acted reasonably and offered to repair them in good time and without significant inconvenience or additional cost to you.
Comment on Returning Damaged or Faulty Goods by Catriona