You do not have to wait for someone to call you to block them. On this same screen, you can type a specific number into the field and tap the plus (+) icon . You can also tap the Contacts or Recents buttons right next to the input field to quickly select a number from your recent call logs. How to Check Blocked Messages and Call Logs
Samsung devices come equipped with technology. If you find you aren't receiving calls but the numbers aren't in your manual block list, check your spam protection: Go to Phone App > Settings > Caller ID and spam protection . how to check blocked numbers on samsung exclusive
If you are having trouble finding these settings, let me know your and One UI version , and I can provide more customized steps. You do not have to wait for someone