Nobody care to ask, if OP are getting any other SMS's from anyone else? It might just be a temporary network outage in the area. I had a
similar thing happening to me a while ago, and I just reboot the mobile phone and it picked up the nearest tower again, and Bob's your uncle,
it worked again. I know there are scams, where people working inside these services, to block your access temporarily... so that they can force
you to reboot your phone. { They cannot do a SIM swap, if your phone is active } So be careful.... if you rebooted and it's still not working..
contact the service provider and troubleshoot the problem. These syndicates pay people inside mobile service providers to do the dirty work
for them.