A: Airbnb shouldn’t have banned you without good reason. I reviewed the correspondence between you and Airbnb, and I am now as frustrated as you are. The only thing the company will say is, “We regret to inform you that we’ll be unable to support your account moving forward, and have exercised our discretion under our Terms of Service to disable your account(s).”

That doesn’t help at all.

Airbnb offers more vague information about its banning process on its website. It also links to that page from your notification. But the most specific information it offers is that you can get yourself banned by violating its terms of service.

So how did you get blacklisted? Your guess is as good as mine. Companies ban customers for all kinds of reasons, ranging from fraud to simple misunderstandings. I recently had a case that Airbnb blamed on a system error.

What really bugs me is that every email you sent to Airbnb was answered with a boilerplate response, saying that it “regretted” the decision but has decided to uphold your banning. It would not say what you had done — or offer any steps to correct it.

Now, I understand that Airbnb is a big company and can’t reply to every email from customers. But if you’re going to ban people, I think they’re entitled to a reasonable explanation. You could have appealed to a manager. I list the names, numbers and email addresses of the Airbnb executives on my consumer advocacy site.

I contacted Airbnb on your behalf. It reactivated your account — without any explanation, of course.

Christopher Elliott is the ombudsman for National Geographic Traveler magazine and the author of “How to Be the World’s Smartest Traveler.” You can read more travel tips on his blog, elliott.org, or email him at chris@elliott.org.