Well done on telling your parents.
Yes it is hard to stop, it is even harder to control it for any period. It just keeps the addiction ticking over and it’ll be waiting for a chance to explode again.
My advice on stopping cold turkey is to not “just” stop gambling. Have those barriers in place. You found that week hard but it would probably have been easier if you had been banned from the casino and had other barriers in place – the addiction is less likely to send those urges when it knows we CAN’T gamble.
It is also important to not just sit there not gambling, plan your time and fill both your time and thoughts with activities away from gambling.
The most important advice I can give is to use support – if we could do it on our own then none of us would be here. Keep posting here, connect to the groups. Use other local support if it is an option, such as Gamblers Anonymous meetings.
I do hope you choose to avoid gambling, it is a progressive problem and things tend to get worse if we carry on. keep posting.