The guarantee ain' worth the paper it's NOT printed on

Hypnia mattress,Starts off fine, then deteriorates rapidly into a soggy mess, mine was a king size, I sleep on my own, the memory foam formed depressions and hollows where you sleep , if you turn over , you gently roll back into the hollow.
The top was coming away from the base, in great gaps.
Tried to claim from them under guarantee, their so called customer service had me jumping through hoops to supply them with photos,(I am 74 and disabled, bit of a job to turn it over , as you can imagine, )
Then surprise surprise, they turned my claim down, on the grounds they could see nothing wrong with the mattress, this, despite at LEAST 2 PHOTOS SHOWING EDGE OF THE MATTRESS IN WAVY LINES.I didnt know you had to be clairvoyant to sell mattresses, I even offered to send them a surveyors report, which they turned down, I think they were frightened of the result, anyway, it's heading for the dump, no more memory foam mattresses for me, back to traditional ones.
A very poor mattress, compounded by a very poor company