Zoom hosted phone numbers spoofed

We had an issue last year with one our mobile numbers being spoofed, we had to discard the number eventually as hundreds of people were being called and then calling us back (there were no calls made from us)

Now this past week, 2 of our numbers have started receiving calls from people returning calls we haven’t made.

We don’t seem to have support for our Zoom Phone service (other than ai chat).

Anyone know what we can do? We’ve only ever had this issue since moving to Zoom.

Many thanks