renault megane middle rear seat belt jammed when seat is folded down

hi have search this but still getting nothing, please help!

I have folded the back seats down and now can't get them back up on my Renault Megane 1.6 Vvt Dynamique 5Dr Petrol Estate
the middle rear seat belt jammed when seat is folded down and is preventing it from going back up,

is there a release button? or a method to deal with this?

any ideas are welcome as it will fail the MOT if we have to cut the seat belt.


thanks

renault megane middle rear seat belt jammed when seat is folded down