Who called from 7788583769

I received a check for 4,800.00 and a letter saying that I won a sweepstake for 485,000.00. I am supposed to call a Frank Roberts at 778 858 -3769 Monday-Fridays: 10am -7pm and Saturdays 10am-1pm to start claim processing.  The memo was written be Mercy P. Anderson Chief Financial Officer

Exactly as above, only the Chief Financial officer was Anderson Becker

same exact thing. I called the number and frank robert was very rude and sounded like he was aggrevated.