Unable to block 'invalid number' that calls multiple times per day

Hello everyone, I have been blocking numbers left and right for the past year. But over the last week there have been multiple numbers that will come up as ‘invalid number’ when I select block number. Is there a way around these spoof numbers so we can still block them? For instance, one has spoofed the number of my roommate’s daughter, and calls her at least 5 times per day. What can be done?

Message an
Expert customer