Variant of the "you have a grant" scam that comes out of India and Pakistan. Do not return the calls. Do not talk to these people. There is no grant. They will demand an upfront fee by untraceable means and when you have sent the money they will disappear. Ignore them and block their calls. DO NOT SEND THEM ANYTHING.
I called this number back and I think it was a regular pwrsons number. I immediately got a vpicemail daying 'you have reached Richard Morganwit' (dont hold me to that lastname it was Morgan something. Lol anyway after it said that it said this vmail box is full. Tired of being harassed byt 8 diff numbers a day.