Expensive low quality beds and pathetic customer service from sealy staff

I bought a Sealy bed (sky line extra firm )at dial a bed last year January , the bed is noisy now after a year , I spent R12 000 on a bed that didn’t even last a year , I complained to dial a bed and I was told the complaint has been sent to the supplier which is sealy and I was told they will send an inspector to come and evaluate the bed within 7 day , I waited no one phoned me, I phoned again and Palesa returned my call she advised me to take a video rolling on the bed I did that , no one phoned me ? I phoned I spoke to Rachel she told me to take another video , I raised my dissatisfaction about the service I was receiving, i asked to speak to the manager she called this rude guy who gave me no hope , I took another video sent it to them again no one said anything, I phoned again Rachel answered the phone again , she promised to call me and she never did as usual , sealy is selling low quality at a high price and their staff are pathetic. Is it fair for me to spend so much on a bed that couldn’t even last a year and no one seems to care.