Restonic Saggy Bed Sets

I'm so disappointed there's a guy by the name of Matshobane from Restonic I sent a complaint with regards to my base set that is only 11 months the base is making squeaky sounds the mattress is sagging I have sent queries upon queries I got a response that I must pay R663 to get a new mattress whereas I have 25 year warranty service on this mattress when I went to the store they approved getting a new base I'm awaiting for the response when they will deliver their service is pathetic. I will never buy their brand ever again.