4 months of complaining and still no feedback???

We bought a leather lounge suite in December from Russells in Primrose, in January it started cracking and the stitches are giving up so I phoned and logged a query, we are now in April and nothing has been done! I keep telling them that the entire lounge suite is ruined and it needs to be replaced, people say they'll get back to me and I hear nothing!!! We have been loyal customers to Russells for 8 years but after service like this we will NEVER buy from them ever again!