I've had a couple of tickets open with a SaaS provider for several months. No response from them.
Last week, I noticed they were having a developer day in London.
So, yesterday, I went along and (politely) accosted their DevRel team and demo'd the bugs in their product.
Hopefully, they're now being escalated.
Not entirely sure if that was fair / ethical of me. But it was the only way I could actually speak to a human about the issue.
We'll see if it makes a difference!