Unable to block unsolicited spam calls
I have managed to block contacts in the past but Lately, I have been getting a barrage of calls every day. I have blocked them as I have received them - both from the call number “I” selection to the recent list of call received list. None of that seems to have stopped further spam calls. My IOS has been updated. I have filtered unknown callers. How do I effectively block these nuisance spam calls - by blocking them from calling my number automatically?
iPhone 8 Plus