Just a quick question

So we moved into a townhouse and our landlord stopped paying his mortgage so the bank sold it and we luckily got to stay as it was bought by a corporate landlord. We have been dealing with a property manager who I can't get a hold of. Here's where I need to give my head a shake, I have no clue who to reach out to. We have nothing in the form of a lease, no paper work, nothing. What do I do?