Two airbeds (High Bradley BD20)

I have a single Aerobed and a double Multimat. Both are super quality. The Aerobed - which you inflate by plugging it in = heaven - has a slow puncture. The self-inflating super comfy Multimat has barely been used but unfortunately (grr) was misused by somebody and no longer inflates properly - as in you can't turn the knobs to keep the air in. I'm hoping that someone out there has the skill set to try and repair these as they're both fab items but unfortunately mending them is beyond my ability. Would love not to put them in landfill.