My MIL is in a nursing facility in TX and is not being properly taken care of. What can we do?

Cfornea, I feel your distress...my family just went through that here in MN with my MIL. Her LTC facility shut down tight in mid March. Had 3 FaceTime video calls and then the virus got into the facility at the beginning of May, first the employees and then the residents. MIL was very sick for 4 weeks and during that time she was moved to a covid designated first floor to enable window visits. The facility had multiple staff out at once (and were gone for 2 weeks each for quarantine). The staff was running around with their hair on fire dealing with the residents, the covid residents, and the distressed family members all while short-staffed. At one point they had 1 nurse for 16 covid patients. It is now July 1 and we STILL have yet to see my MIL in person, even though she completely recovered from covid. Your frustration is totally justified but there is not much the facilities can do. They will return your call when they themselves know what is going on and have the time. I suggest you leave very supportive, respectful voice messages and they may call you back sooner. Other than showing up in person (and even then they won't let you in) I don't know what else to suggest except patience. I wish you peace in your heart as you wait for word on your MIL.