Hi Dorekido103,
Thank you for posting in Microsoft Community.
I'm sorry to hear that the Microsoft Arc Mouse stopped working. I appreciate the effort in performing the troubleshooting methods.
In this case, please reach out to the Customer Support to get it replaced. Visit our contact us page; https://support.microsoft.com/en-us/contactus/ to contact Microsoft Surface Support.
If you're located outside the United States, you can check our Global Support Contact page; https://support.microsoft.com/help/4051701/.
In contacting the Customer Support, please see to it that you are on the right region by clicking the globe logo: