Pathetic service

I bought a bed in February at Sleepmasters online, when i called to complaint about mattress a few days later i was told to wait for a month before logging a complaint. So in March when i called back after a month. The perfect excused was Lockdown which was understandable, but also posed the question to what do i do with a new bed that is causing more back problems? Eventually on 1 June Sleepmaster online decided to answer their calls after several attempts, however was just given a reference number. Up until today 29 days later no one bothered to call and nobody are answering calls. This is pathetic as this bed are causing me more back problems then anything else