@Carmel36 I am so tired of these "technical glitches"! I am still waiting for a refund of the host fee overcharge due to of course yet another technical glitch. I do not know of any other company that regularly has technical glitches that result income in their favor that is subsequently not refunded back for weeks on end. Try social media, it often helps in getting attention.
I have just come up with conspiracy theory about this. All health insurance companies have a built in model of automatically declining a certain percentage of claims from physicians for services regardless of whether the physician did everything correctly. They hope that some will not notice, some will not refile before deadline and if they get to keep some percentage on the millions in claims, it adds up to a pretty amount. Plus there is interest the longer they keep the money for themselves. Perhaps Airbnb operates on the same model- a built in number of "technical glitches" that result in non payments, underpayments and so in hopes that some of us will never catch it, some of us can be dodged and we will go away eventually and some will be paid later rather than sooner but interest will be collected on the money in the mean time