...I intend to keep my promise to myself to stop gambling altogether and I will totally achieve it because I am very decisive about it. No one can stop me now, it was that going from 20 to 800 dollars and losing it all that made me do this. ..
The fact that you have realized the problem is already a positive step towards starting changes for the better. Now you need to replace your gambling cravings with something else that will also bring you pleasure. You can try skydiving, which also triggers the release of dopamine, just like when gambling.