Having paid nearly £3,000 for a mattress - more than we have ever spent on any item of furniture before - we are devastated to find it so uncomfortable that one of us is unable to sleep on it without suffering severe back and shoulder pain. We spent 3 nights in 2 hotels, with similar 'zip & link' mattresses, and had the best night's sleep we could hope for. John Lewis tell us there is nothing wrong with the mattress, despite it being so rigid around the edges of each mattress that it feels like sleeping in a hammock, and tell us they cannot do anything. What happened to that great customer care and service?