Hello Spartan_Sayin,
Unfortunately we can not remove temporary abandonment sanctions as we simply do not have the ability to do this, it is handled solely by the game.
A 24 hour ban is usually given for multiple disconnections in a short time.
You can check our server status here in case of any maintenance or outages at the time of your disconnection here, in case this is what may have cause your disconnection -
https://rainbow6.ubisoft.com/status/
If there are no issues with the servers at your time of playing and you did not leave a match early at any point, I would recommend trying some connectivity troubleshooting to strengthen your connection to our servers -
https://ubi.li/YPwnl