it is a fraud company please search on goggle by the name of golden sparrow e services. u get many cases regarding this, i also got call on 17 dec till today. they had offered me the post of assistant engineer told me to deposit the amount of 2250 than after they had taken my hr round, again demanded for the money of 6600 for the offer letter. as i know they are fraud i didnt gave them much response and please u also dnt give them response or block them.