Contact Info Wanted for Waller TX Office

I lost phone service last week-end. My phone is dead. I have no dial tone. I filed a trouble report online. A repair technician was scheduled to come out last Tuesday. In my report, I gave instructions for the repair technician to send me an email message to establish a time frame for his arrival. I live in a rural area, about 12 miles outside of Waller (Texas). I have security gates. Whenever anyone needs to get access to my property, they need to contact me in advance to establish a time frame in order for me to be available for them so that I can open the gates to let them in. Also, living where I live, I do not get a good cell phone signal, so calling me on my cell phone is hit-or-miss. That is the main reason why I've kept my landline. That is also why I specified contact by email. I do still have internet access (obviously), as I do not get internet service from AT&T, but through a fixed-point wireless service that is completely independent of my landline phone system. The technician did come out last Tuesday, but could not get my attention to open the gates, as I did not know when he was coming.

I need to establish communication with someone with the office in Waller (Texas) in order to establish a time for them to come out. Can I get either a phone number or an email address for someone out of that office? I could meet with someone at the Waller office and lead them out to my house, if I knew when to meet them.

I find it very ironic (and very frustrating) that I am having so much difficulty communicating with people at the phone company.