When you open casino's site you can find information on the footer (bottom of casino's site) about casino's license or jurisdiction under they work.
Also you find this information in Terms and Conditions or ask directly casino support.
This information guarnatees you to protect your winnings, withdrawals your gambler's rights.
Generally, online casino for saving of your reputation try to apply comfortable terms for players, process withdrawals as players request.
But sometimes an unusual situation may arise. Or temporary hold for verification and etc.
In this case I advice to make screenshorts or record video of your player's account (good soft for this may be BandiCam), account activities, deposit and withdrawal statemetns, chat or email contacts with casino support, games you play.
And do it when you into account.
At first, try to resolve all issues with casino. But if not help or casino ignore your requests, you can attach all your game's account activities and report to gambler inspector or country gambling regulator, where casino is registered.
It takes time, but if you are right you will have a success.
Also about your situation you can post on famous gambler forums.
www.askgamblers.com and www.casinomeister.com
Below you can see links of most used gambling jurisdictions, which can help protect your player's rights:www.mga.org.mt Malta Gaming Authority
www.gamblingcommission.gov.uk UK Gambling Commission
www.gobiernu.cw Curacao Department of Justice
www.gibraltar.gov.gi/remotegambling Ministry of Finance Gambling Division
www.meic.go.cr Ministerio de Economia, Industria y Comercio Costa Rica
www.mof.gov.cy Cyprus Ministry of Finance
www.gamingcommission.ca Kahnawake Gaming Commission
www.gov.im/categories/business-and-industries/gambling-and-e-gaming Isle of Man Gambling Supervision Commission
www.mef.gob.pa Junta de Control de Juegos Panama (most used for USA and CA casinos)
If you want to play, but casino doesn't accept your country.
In this case I recommend to play at BitCoin casino.
It's no secter, that now this is the most popular and anonimous method of payments.
The most secure and quickly you can buy bitcoin by card or wire on:
coinmama.com (US accepted)
coinbase.com (US accepted)
cex.io (US accepted)
Create within some minutues bitcoin web ewallet and buy bitcoins by payment methods you can find on site and accepted in your country. Main benefits of bitcoin casinos are quick registration, instant deposit and instant withdrawals. This is also secure and anonomously.
May be for anyone will be a little negative or positive not stable exchange currency of bitcoins. For example: You exchanged 1000 euro, GBP or usd and got 1 Bitcoin. Then make deposit to casino and won 2 bitcoins. Then make cashout from casino to your bitcoin ewallet. But now, when you try to exchange your bitcoins to euro it may be costs no as 2 BTC =2000 euro, but 1800 euro or less. But may be 2500 euro. In this case I recommend to monitore exchange currency. If it's not good for you, try to wait some days.
Recommend Bitcoin Casino Start to Play and Get Good welcome bonus
Hints concerning Bonus terms
Generally, bonuses offering by casinos are good gift, but usually it requires wagering, example - place bets x25-30 times.
If you don't like or don't want bonus or receive offering bonus, before playing (place bets) you can ask casino's support to remove it.
In this case you will be played on your own deposited money. And again, if you decide to get bonus, you may ask support to return your account in bonus terms. From my expirience, when I don't want offered bonus, I make bigger deposit than unusual and play on my own funds.(Example: no 500 euro + casino bonus 200 euro, but my own deposit 700-800 euro)