Spam of Google Text Messages (Nokia 2780)

A couple of months ago, I had to switch back to my smartphone despite loving my Nokia 2780 (not so much the ads but, everything else). When I have tried to go back to my dumbphone I get a spam of Google's F2A codes. The first time I switched I fixed this by disabling my RCS in my iPhone. For some reason the spam seemed to be connected... Now, I'm not for sure. If this information helps, I had an Android (Note 10+) several years ago if that is something I need to disable somewhere. I've already done all of the regular security measures of protecting my Google account. There is no reason for my phone to be spammed with these text messages.

I've gone to AT&T but, they were absolutely no help. Nokia 2780s do not have the option to block numbers. This wouldn't be so annoying however, it is CONSTANT and RANDOM. Anywhere from 10-15+ messages a day, day or night, no matter the time.

I've attempted to look at a TCL Flip 2 for the blocking number feature (and no ads) but, they are getting expensive due to being discontinued. The only other option I have is a AT&T TCL Classic.

Does anybody know what I can do to stop this? Or, any advice. Thank you.