Finding Customer Support

If you were using a betting platform for several months and had never made a withdrawal before, what would you want to know before doing it for the first time? I am not talking about choosing a payment method specifically, but about the overall journey from requesting the withdrawal to seeing the money arrive. Would information about the sequence of steps, possible account checks, expected processing stages, and what to do if something takes longer than expected be useful to you?
I sometimes find that the hardest part of dealing with an online service is not actually explaining the problem, but figuring out who should receive the question in the first place. If a bookmaker offers several products, promotions, and account functions, would you prefer one central place where users can find the relevant contact details? Or do you think support information should be integrated separately into each section of the website? Which arrangement has been more practical in your experience?