I hit *60 on  my phone to block this number. However, they use several numbers. Block all of them.

IT CONNECT SEVERAL TIMES a week at my 800 numvwe

I get several calls a week from Harlingen TX.  No one is ever there.  Alwasy to my 800 Numbers which I get charged for. There is a pool of numbers that do this when you call the numbers back you get a modem/fax tone.