Photographer Bimal Nepal accuses PM Narendra Modi’s social team of stealing his photo

PM Narendra Modi has run into controversy over a Facebook post on his official account. Modi's Facebook account has allegedly used a photograph of a US-based photographer, Bimal Nepal, to wish people on Dhanteras.
But surely that is not a problem? The issue is that the photograph has been allegedly used without taking permission from the photographer. At least, this is what Bimal Nepal claims.