Stunna I would like to talk to you in private about this, can you please check your inbox.
This is a big deal imo and I think I deserve to be able to talk to you at least.
I sent you a PM and you've been online a couple times since but not responded.
You are not going to get anything back. Just face the facts:
1. You gambled more then could afford to lose without being depressed or in financial trouble.
2. You believe in a gambler's fallacy, a sign of gambling addiction. Previous rolls (like 4x losing 80% in a row) have no outcome on the next roll or this whole "my seed was more likely to win" bullshit.
3. Refusing to understand that you had a fair roll. Even after the error occurred there was a period between when the screen reloaded and the period when you clicked "roll". It is your fault you did not check the client seed and instead clicked roll without haste.
The end result is that you lost. The bigger issue is that you are showing signs of gambling addiction. Gamblers out of control believe in gambling fallacys like you have presented you believe in as well as make "all in" or substantial wagers that are not "mere enjoyment" should they lose. Consider it a lesson and move on. Consider that you might have a gambling issue too.
If Stunna were to refund you, then he would have to do it for everyone that experienced some sort of error and then pressed roll. Which would make his site unprofitable in the long run for him. All rolls are final which are in the FAQ. Unless you can prove that the roll was not truly fair, which it was, you have no grounds for a refund of any sort.