Honestly, I just experienced this, my friend, precisely yesterday, where I gambled with a budget of around $ 5 and half an hour later I managed to win $ 30, so the total was $ 35 including the amount of capital I brought, I played on a type of slot game at a local online casino in my country and after I waited a few hours, it turned out that all the amount I cashed out ($ 35) had not entered my account, until now I have not received it and clearly that means I chose the wrong casino to bet, OMG honestly it's very annoying. 
I have tried several times to contact the service but there was absolutely no response and in the end I had no choice but to make peace with the situation, so it is very important for us to first make sure that the casino we choose is a reputable casino.
This is really sad. This and many other reasons are why I take casino reviews very seriously, especially when I am using the casino for the very first time. For online casinos, there are many scammers online impersonating genuine casinos, it is very neccessary to be careful when choosing a casino. A good recommendation from a trusted person will go a long way in helping us choose.I have tried several times to contact the service but there was absolutely no response and in the end I had no choice but to make peace with the situation, so it is very important for us to first make sure that the casino we choose is a reputable casino.
Aside from this stated above, most gamblers are the cause of their struggles with casinos. Most of these restrictions are clearly stated in the casino's Terms of Service, but most gamblers don't bother checking out what is written there. They only refer back to the TOS when they face sight challenges.
Well, I don't know about how your country handles gambling regulations. You should file a report against the casino. Create a public statement warning everyone to stay clear from the casino. You would be saving many others from such a dubious casino.