Octa is a global broker with over 300 trading instruments. It covers over 180 countrries and have been on the market for 12 years. The customer support is available 24/7 in multiple languages.

It mostly depends on the payment method you have chosen to deposit or withdraw. Usually, the deposits are done instantly, regardless of the methods. The funds you deposit should show in your trading account immediately. If they don't appear within minutes, then you should contact support.
As for withdrawals, it takes longer. First, you place a withdrawal inquiry and your inquiry first needs to be approved by Octa. They check if you have sufficient funds in your trading account, and if you have open positions they check if your withdrawal amount is within the limit of the required margin to keep your positions open.
How long it takes for the funds to reach your bank account, that mainly depends on the payment method. The fastest method is crypto, then e-wallets, then bank cards and lastly wire transfers.