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Is there anyone I can complain to or anywhere to report this discrepancy to at Google?
Sorry--I deal mostly with PPC and am not really familiar at all with local search. Any help is appreciated!
I'm supposing that this error could have occurred if your company has multiple offices, and perhaps the one in Texas got incorrectly associated with your corporate office? Alternative possibilities include if a business in Texas shared same/similar name as yours, or if one of Google's many data partners has that error in their database, or if your corporation inherited a legacy phone number (or even perhaps, if a business in Texas mistyped your phone number as their main contact number on their website).
In any case, you should be able to go into Google Maps to report/fix the error:
I suggest searching in Google Maps first to see if you can locate an incorrect listing for your business.
Also, on the assumption that this error could've come from many of their other data partners, I recommend trying to check the databases of some of those top business listing aggregators:
If any of those has incorrect data for you, it can get replicated out on thousands of other websites which use their data.
Note: aggregators get their data from many other sources as well, including local print phone books -- so, the error could've crept in from many different sources.