Ehm what blizz?

ehm so i just got banned for disconecting , its not my fault that there is water flooding in my town that makes my internet crash, i mean c`mon how can u put that blame on me. atleast give me another chance

Unfortunately all disconnections and game crashes counts as leaving the match and will be penalized appropriately. The game server has no way to discern a legitimate disconnection or game crash from one that is forcefully caused by a dishonest player to bypass leaver penalties. You can learn about this policy here:

Since you already have identified the connection issue, I will spare the troubleshooting advice, however please play responsibly and avoid playing critical game modes when there is known issues with your connection.