I had such a relation with a provider (not hosting, but anyway).

The guys were obviously "bad guys" you know. Being sarcastic and all, about issues that were their and not mine.

Anyhow, I played nice until I got everything, as you recommend. Once I did, I wrote that they had a very poor service etc.

They pasted my communications with them where i've been nice saying that didn't reflect it etc.

Moral of the story, you should do whatever you like, the outcome is hard to determine.