Bradlows /Seely

I'm a very unhappy client!!! I bought a bedset from Bradlows in Somerset 2020/2021 now 4yrs later I have a problem with my mattress (Seely by the way) at the time in my eyes Seely was the best but now 4yrs later I'm not so sure. I had a valid warranty complaint according to me and them but I'll need to pay R3500. Why must I pay if it's a warranty??? If it was a repair qoute I'll understand but why must a client pay if it's a valid and approved warranty claim??? Bradlows on the other hand is standing one side and referee me to warranty policy, why when there is a valid claim now the warranty policy gets shown to clients why not explain the same policy up on making a sale??? All I need is for someone to contact me with a solution. Guys this policy doesn't make sense period