Sealy Poor Quality Products

I'd just been retrenched end of Jan 2018 and decided to treat my family to new beds from Dial a bed. Bought my daughter a 3/4 Sealy bed. Cost was R5000. After 18 months I noticed a dent in the bed. I called dial a bed who then laid a complaint with Sealy. Sealy only sent someone to check the bed a month later. I then get a call saying that because the guarantee is up after one year I need to pay R440+- for the replacement of mattress which is under warranty. No one ever told me that there is a fee till now. This is my 2nd year of unemployment and I must pay for a replacement mattress which obviously means the mattress I have is a reject. This is not fair. The mattress will only be replaced when I can deposit the funds. This is not fair and I'm unhappy with Sealy for poor quality product and Dial a bed for not giving me important Information of fees/charges when under warranty.