Firstly, you need to authorize CallMeBot in Telegram, only then you will receive messages. If you haven't authorized already,
Click Here and then send /start to authorize the bot.
After clicking on start, the web app stops only after a vacant slot is obtained or unless you click on stop button.
Never close the browser, or the tab where the site is opened, it has to be always run on the background.
To report any bugs or to add any new features visit Github Repository of this Project
This is an experimental project, and it may not work at sometimes