So if I understand correctly Teoiss and PLoTR are accussing you of stealing resources? I dont know if this is true or not (its a common trend in these types of mods so probably pretty likely).
However next time if they do - ask them where they got this oliphant from? And who they think made it?
Ill tell you who made it - me around 2 years ago,
I wasnt asked if they could use it, nor was i given any credit or mention, and hence i never gave permission for them to use it.
Lots (not all, but lots) of these small time LoTR mods do the exact same, its common place to steal resources.
There have been so many reincarnations of lord of the rings mods it does my head in, if your going to create a mod why not come up with something unique that stands out on its own - be creative. And if you really must make a lotr mod make something unique that makes your mod different from the army of other LoTR mods out there.
PLoTR do the exact same, they steal resources to make some shoddy ass remake of a mod that has been done a thousand times over.
Rant over