Remove Mexico area code from text

[Timmandy1]

I recently went to Mexico and since my return, I can no longer text one person in my contacts list (which happens to be my wife). When I look at the details, it still showing the +52 at their phone number with the messaging app. I’ve tried deleting the phone number within the contact and even deleted the contact and it still won’t work. I have the Pixel 5. I can receive texts from her phone, but she doesn’t receive mine. Any help please. 

[Ann154]

Have you checked the Assisted dialing option in the phone dialer app settings? 

[Timmandy1]

From what I’ve been able to figure out, yes I’ve tried this but no it’s not worked.