Who called from 7129450180

4-5 calls a day for the last week, most of the time no one is there, if they are they don't seem to hear me

I called them and they claim they were "following up" with us regarding a request we made at their website for a grant. No one at this number has ever visited their website or applied for a grant.  Clearly some sort of scam.  We are on the Do Not Call List so I have no idea how they did get our number.  I asked to be removed and will report them to the FCC if we receive another call.

You can go here https://www.donotcall.gov/Complain/ComplainCheck.aspx and register a complaint about the number.  Enough complaints will usually warrant an investigation.

called and could not understand the caller. foreigner who could not speak english well.told them not to call again

I got called four times today.  I am also on DNC registry.  The numbers were different though:

816-389-2896
913-529-2909

I have no idea how they got my number.  I added both to the DNC complaint page.  I encourage you to do the same.