I'm really tired of receiving calls every day from this number,sometimes as many as three times a day.
I don't answer because it's an 888 number and I've found that this prefix usually is an unwanted call.

that is the answer I think...I just received a hard copy that said they were trying to contact me to vote

Did a broader Google search on this.  It appears to be listed as "Boston Financial Data Services" - I think this may be a service trying to get you to submit a proxy vote for shares you may own in one of their clients stocks or funds.  It can be hard to get quorum, so they spam the phone system to get people to vote with the board.  

This caller calls ever night between 7:30 p.m. and 8 p.m.  Has called now for 2 weeks.  We don't answer because we do not recognize the phone number.

this number is calling me multiple times and day and leaves no message and can't be called back!

Same as above.

Calls from morning until 10:30PM EST, no message and blocked, cannot call back.