It can take as little as five leaver violations to trigger a season ban. If you are experiencing any amount of bad internet, please take time to try and troubleshoot it. There are many steps you can do to help fix or at least identify issues to why you are disconnecting. If you have not already please start with these starting troubleshooting steps:
If you need more help, we can provide assistance in Technical Support Forum. As always, all disconnections do count as leaving games and will be penalized appropriately.