bad service

I bought a bed about 6 months ago, the base and mattress is damaged, I layed a complained to the store and got promised that it would be sorted out, by replacing the units as it is a factory fault. The supplier contacted me and confirmed that it is a exchange unit and the store was informed about the finding. Almost 2 months down the line I'm still waiting for a response from the store or any indication as to when it would be done.