Hard to believe that Big Tex and Bob are going to try air horns and duck calls on people that have their phone numbers. It would not take much for them to call Tex and Bob from a phone other than their telemarketing phone and...guess what.
I get the same INSACCOUNT call several times a day for weeks as well as MERCHANT CASH, SMALL BIX FINANCE and BIZ FUNDING PRO. Just like you, it interrupts my work day significantly, but it's very hard to get rid of them.
Robo Call is from "Health Insurance For Everyone", web site is http://myhife.com. If you want to get off their list, you might try calling them directly on their 800 number at 1-800-803-5166. If that doesn't work, you might try complaining on their Facebook page at https://www.facebook.com/pages/HIFE-Health-In ... 140985875965672 Perhaps someone there could help you. Sorry the Facebook link is so long, but they don't have even enough likes over the last 2 years to shorten it.