Restonic Bali Sinking

I bought a bed (Restonic Bali) last year within 10 month the bed is sinking, I've logged a query the store and head office whereby i've Requested Peter Sadiki who is Area manager to call me and he never bothered to call me nor resolve my query. Selalelo the store manager she is forever with i don't know answers and acting like she is doing me a favour to resolver my query. I am the point that i want to cut off ties with JD group they refund me i will go buy a bed at House&Home or OK furniture.