I receive a small benefit from a charity that covers people who used to work in a certain job because I'm disabled as a result of that job. I asked if they'd buy me a new mattress because my old was was knackered. They did, and it arrived this morning but I can already tell that it's not suitable - it's so thin and hard that even laying on it to test has left my hips and lower back really hurting and I could feel the bed base through it. My partner said the same.
I don't want to be ungrateful but I can't use it - I already have problems sleeping and this is only going to make things worse. Should I contact the charity and ask if they'll take it back? It was bought from Wayfair and the reviews seem to have suddenly gone really bad so it look like the mattress has declined in quality recently.
Thank you