Depends on the site. If it's those unpopular websites, expect that there will be no fair judgment on the case. Those sites will not give $1,200 in just a simple KYC as a solution. If it's involved legit and popular websites, as long as everything turned good on their investigation, the chances of getting that amount are high.
OP never mentioned the name of the site. Only if we know it, we might contribute to pressuring the site if we see it's unfair.
Nevertheless, for the large amount, this will always be expecting that there is KYC, that is why I prefer to read first the TOS before using any gambling platform casino which gives you a knowledge towards their TOS.
A story always has two sides. But what strikes me most is that casinos and other gambling sites make their terms and conditions in such a way that they can always hide behind camouflaged points that then apply. An example is the registration process, if you come from a certain country you are not allowed to register, but the website to register is available. You can then ask yourself who is wrong. Would everyone these days read every condition from A to Z? I do not think so. It is also a matter of trust and reputation.
ya.ya.yo!