Omg I'm so so sorry to see this. :( This is probably the worst that can happen to a collector and it makes me so sad. Please don't try and repair them though, it's not worth it. Just return them and save the money for when they show up again. I know it hurts and a part of might really wanna keep them but it won't make you happy. :(
I recently got one of my grails and the seller had already stated that it had a little damage, a piece of the collar had broken but was glued back together and honestly, you barely saw the damage on photos and even now that I have the statue here, I don't really see it. I don't mind this damage but sadly I don't think you'll be able to repair the two like this ... ;__; the damage just looks way to severe.