Mass Delete "unknown contacts" - actually spam calls - in MS Teams (skype replacement)

I just did the migration from Skype to the MS Teams replacement. And in my call list, there was a crapton of "unknown caller" entries, all on just a few dates. According the MS documentation, I have to select EACH contact, one by one, and then do a few mouse clicks to delete that ONE contact. Sheesh, there are at least 50 of those entries. Is there a way to do a mass-delete and block future "unknown caller"?

I ddidn't use skype very much, and I certainly don't remember seeing all those spam callers in my old Skype caller list.


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I’ve noticed the same. I’ve deleted them but the last one remains under chat.
Most likely they’re spam calls.