Welcome to Android Central! What kind of phone are you using? Here are a few suggestions:
- try turning your network connections on and off
- see if the issue persists in Safe Mode
- is your SIM card relatively new? Maybe it needs replacing.
- see if the issue persists if you download a third-party SMS app, like Textra
- check with your contact (through Facebook Messenger or some other means) to see if they are able to send all of their messages to you
- if all else fails, contact your network provider