If your mantis can stand, hang, and use its mouth, all it will need is a little help like is shown in the photo.
Mash a feeder and put it on a stick. Teach the mantis to eat it by putting a soft part to the mouth like with the honey. Once it is eating, you can adjust the height of the food for the comfort of the mantis. It will probably need to be done until the next molt. It is work that will pay off when it corrects itself. :wub:
Be prepared for the possibility of a fight tomorrow. It may flail its legs and be very frightened of the stick with the food, but if it is hungry it will figure it out. Wetting the food and sweetening it a little with honey(not too much honey), helps alot.
My mantis will sometimes walk up to the stick and eat now that she knows what it is. She has the will to eat and live. I hope she can pull out of the next skin as I have had it happen before with others, resulting in a perfectly molted mantis.