Hi,
I'm Sumit, here to help with your query in the Microsoft Q&A.
Apologies for any inconvenience you are experiencing. I am happy to help you today.
It seems like the charger has a defect. Can you open the Surface app and ensure the set battery level to 100%?
Is the device under warranty?
I look forward to your response and am happy to work with you until we find a solution. Please keep me updated.