Top of headset cushion replacement

Everything about my Razer Kaira Pro is great but the cushion at the ripe that would be on the top of my head. The cover of that has now started to pull out of the headset I tried putting it back in there is no rips tears or any form of damage done to the headset it was intact yesterday and I woke up today and all of a sudden the back of the cover is now loose and the cushion is exposed I tried to put it in but the td not working how do I fix this