@Biswapriyo this chat is not here for you to @mention someone every time you'd like their attention/assistance. Mentioned are usually for when someone already expressed an interest in the conversation or when responding to someone specifically (usually when it may not be too clear to whom you may be responding).
As a side note, mrexodia is extremely responsive in the proper channels and issue #1 shows no effort whatsoever. I would have ignored it as well.