@Denyse8 So sorry this happened to you. There have been many posts on this forum over time which make it clear that other hosts are no different than regular guests- in fact, they may be more critical, leave the place a mess, sneak in extra guests they refuse to pay for, leave bad reviews, and seem to have no sense of camaraderie with other hosts.
That hasn't been my personal experience- I've had 3 guests who were also hosts and they were very sweet and lovely guests. So it's certainly not a given that other hosts will be bad guests, but it does happen.
Is it just that this host/guest left a bad review, or are they trying to claim a refund due to bogus "dirty" claims?