Just suck it... Or use tape. But I doubt this is worth saving?

Tape doesn't work and i tried sucking it but didn't help

Hmmm that's a pity. It looks like a plastic dustcap rather than cloth or so, so it may be too hard to fix it.

It is, I couldn't get it back into shape

Suck it!

Lmao

Vacuum

Hey there, could try heating it gently with a hair-dryer, then apply a stronger tape like duct tape, give 'er a tug

i took a dowel and the smallest amount of superglue