Bad service and no assistance with regards to my bed complain

I bought a Truform bedding regal orthopaedic non-turn bed set from DecorFurn Northing riding 4 yrs ago. A few months later the bed started to dip in the centre even though I followed the instructions to rotate the bed every few weeks. I sent an email to DecorFurn but got no response from them. Fast forward to now the bed is getting worse, to the point when I can hear the spring squeak as I turn and I wake up with a sore back almost every night. I emailed DecorFurn and still no response, eventually reaching out to the manufacturer as the bed was still under a 5 year warranty from Truform...they sent me back to DecorFurn. I eventually went personally to DecorFurn and complained about the bed and the fact that no one was helping me from their store and was asked to resend my original email that will be sent to the regional manager. Long story short I sent two more emails and numerous calls and still no one from DecorFurn is responding back.