I think ops probably knows this Cpt? is a moron... so it wouldn't suprise them if the paperwork wasn't signed. He is treating you very unfairly and probably because you are new also. He is just throwing his weight around so to speak.
Talk with some of the other FAs and see if they have the same problem. Or if it is really stressing you out, call your line supervisor or flight attendant manager, they then might speak with the cheif pilot on your behalf.
The guys a toss and i bet that majority of the other pilots and FA's loath flying with him.. Don't worry mate there always has to be one major co@k and he just happens to be it
You could always put visine eye drops in his coffee on the last leg of a flight..and maybe he will get caught in a traffic jam on the way home from work and get a sudden bout of diarhoea.. (oh so naughty)
Good luck with the career and don't let this particular person ruin it for you...
cheers
gallie girl