We recently bought two Next sofas that feel are much firmer than they felt in the store. It was too late to return once the family all agreed this. We thought they'd be ok but no one is happy with them. Wondering if anyone has used a company to fit replacement foam/fibre - ideally I would like to send the cushion cover form them to be filled as I think it can be quite tricky. Also would like to feel a sample as don't want to make the same mistake twice. Any thoughts would be appreciated.