I don’t know. But I think about a day or two going off of someone else’s adverts.

I used FA's ads some years ago and got planned use it again soon.
You send them the info, and after they check all is ok, they send you the payment request.
After pay, as I remember, it can take less than a week to start appearing.
They also send you weekly reports to your email showing the daily number of prints and the clicks on the ads.
It worth it.

I've send the payment through and haven't heard anything yet. It's only been 4 days so far, but I was expecting a confirmation at least.

Wait 3 more days (maybe they are busy), and if not received answer, contact them again.

Only took me a few days when I posted ads before I saw them