Using free hosting options like repl.it or Heroku for continuous 24/7 bot hosting is strongly discouraged. Instead, opt for a virtual private server (VPS) or use your own spare hardware if you'd rather not pay for hosting.
See our Discord Bot Hosting Guide on our website that compares many hosting providers, both free and paid.
You may also use <#965291480992321536> to discuss different discord bot hosting options.