I used to use VRBO and HomeAway (HA) exclusively and only added Airbnb in the last couple of years. I wouldn’t say they are better than Airbnb, just different. Pros and cons on either side.
Except for outright owner fraud, I don’t think VRBOHA gets in the middle of disputes like this. However, they are notoriously unhelpful in the event of a credit card charge-back.
Airbnb is known for taking very uncompromising positions against owners.
For a problem like you are having I recommend Twitter. @AirbnbHelp They are very responsive. (It’s the only thing I use twitter for!)