It's not stake's fault when you lose a bet. It is entirely your fault. Maybe it was a bug since you didn't get ban from violating their rules or something like but a request made by you to self-excluded ban. Gambling sites are like that, when you ask them to ban temporary or permanent is you cannot deposit or withdraw on their site but in your case is you are able to deposit and bet. My guess is as stated above that it is bug/issue or you aren't ban yet.
Totally agree on this since we cannot blame the site if we lose are money because in the first place, its gambling and you should really understand the risk of it before you complain. Yes, you asked them to banned you from gambling but if you didn’t help yourself to stop thinking about it, you can still fall on that trap and that’s what happened to OP. Learn from it and commit to stop from gambling, don’t ever try to deposit on any site again so you wont blame them.
Once you do make out deposit on your own will then no one should be blamed out but only yourself and just like others been saying that its your fault even though the site does have some lapses too
but in general aspect then you are the ones who do make out such decision and once you lost then its final and you couldnt take it back no matter how you do argue or complaint because this is
in regard with your own action not theirs.
Understand the risks involved in gambling and its on your self will do knows which one is bad and which one should be done.