Having been on the receiving end of terribly broken "pipelines" at startups wanting to hammer away at my resources, the right response is terminate first discuss later.

I know of a company that explicitly had a "call us to discuss first" clause in their contract with a smaller cloud provider. Everyone was on holiday and not answering the phones while their hacked account was being used to spin up dozens of boxes launching a DoS attack against a crypto scam site. Guess who had to eat the bill on that one?