If you are using a Visa Debit Card and your bank is eligible for Visa Direct, your withdrawal should be received within two hours. If your bank is not eligible for Visa Direct or you are withdrawing to a Mastercard, withdrawals should clear in 1-3 banking days.
No, most VPNs don't work at all with bet365 if the site detects that you're using a VPN, it will deny you access to your account. So, you need to make sure you purchase a VPN that works with bet365 and also has servers in locations that work with bet365.