Hi Bishal and welcome to the site. Well done on looking for help.
Read the other stories here, you will see a lot that you will relate to. You will also see the success stories – what are they doing that you can apply to your own situation?
You can stop gambling I promise you. The important thing is to use the support that you have available. I see you are in London so as well as this site you will find a lot of Gamblers Anonymosu groups there.
Keep posting and let us know the positive steps you are taking.