The worst mattress I have ever had.

mattress is only 1.5 years ago. It felt ok at the beginning but after a few month the mattress started to feel like it has no support. I was always falling from the bed and it was impossible to sleep the whole night through without waking up. I thought it was my imagination but when my girlfriend came to spend a night with me, she also complaint about it . 25$ to come to your house to inspect it?