Bad Branded Sleepmaster

So we bought a bed at Sleepmaster in brits and three months later the bed was messed up , around July we went back to the store to report it and they informed us that its not their fault and its a factory fault , which is understandable they said they will do the exchange for the mattress as its the faulty one in August month end they exchanged the bed now as we speak the bed is messed up again Sleepmaster is not a good brand to buy I tell you