Hey there. It feels like the main question aims for the casino representative. Usually, the first withdrawal is the slowest due to the documents required for successful verification. Perhaps you should know this casino is not considered to be among the safest, so I would recommend checking its Safety Index 👈.
Given the information "High value of withheld winnings in player complaints in relation to the casino's size," I would say you should reconsider whether 36 hours are actually that bad or whether you will see the winnings eventually - if you catch my meaning.
But don't let me scare you; be patient. We shall see how good they are at paying out. When it comes to the complaint, perhaps you've noticed there is a certain time frame for the action, hence, again, give it some time, and keep us posted, please.