If you are outside of Walmart's very limited "delivery area" then you'll have to use another service like Door Dash or Favor, etc. to get your groceries delivered to your home. I usually use Door Dash because I know there are several drivers in my area but it's really your personal preference on that front.
Try HEB. They own Favor I think.
You should try other retailers that do service the neighborhood and it's population.
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