This is one of the numbers from Direct Buy. Also use number 713-357-5255.
They have called at least 5-6 times in the last 2 months. I've actually picked up 3 of those times, and it's some lady with an asian accent telling me that i can choose from 3 different gifts if I come to a 90 minute presentation of their products/services. Each of the 3 times I told them to put me on their do not call list, but I keep getting calls...finally tonight, I filed a complaint with the Federal Trade Commision on there Do Not Call Registry:
https://complaints.donotcall.gov/complaint/complaintcheck.aspx

This company is a menace, and should be put down! Feel free to file against this company...