9 month old not sleeping

[AusMumhere]

Help!
It's been nearly 10 hours since my 9 month old had a sleep and no sign of him settling anytime soon. He just wants to play

Anybody? He's totally dropped his day naps. Help!

My 9 month old is refusing naps also!
We have only ever been able to contact nap hates cot or anywhere else to sleep in the day so I’ve just rolled with it until I need to stop.
Anyway, NOTHING will work my baby simply refusing to sleep in the day. Feeding to sleep used to work no matter what but even that doesn’t, we went 4.5 hours awake managed to get 15 mins very very light sleep feeding; then we went 5.5 hours awake and finally managed to get a good nap in but had to wake baby as it was 4:30pm!!
Clearly so overtired :( it’s got to be a developmental thing because I’ve read so so so many threads at similar ages!

Im just trying to not force it and once everything becomes to stressful and to much pressure we leave the room and try and reset with some fresh air and try again 40-60 minutes later. What more can we do?:(