I get very few of these scam calls/Text etc and I put it down to registering my phone numbers with the free TPS (Telephone Preference Service) but this service does not block International calls,
https://www.tpsonline.org.uk/tps/index.html
So.........
You can block most calls on Android using this information,
https://tunecomp.net/block-calls-fro...t-in-contacts/
There are plenty of Call blockers on the Playstore for Android and on the Apple store.
I use,"Should I Answer" which has a large database of bad numbers and no Ads/Nags unlike other Number Blockers and no registration required.
https://www.shouldianswer.co.uk
There's more useful information here,
https://epidev03.citizensadvice.org....lls-and-texts/
HTH