TestDisk always return corrupted files

I accidentally remove all of my files (Python Files) in Visual Studio Code, and I tried to use testdisk tool to recover them, I checked what filesystem I’m using, and it is /dev/sda5 and the type is ext4

This is the steps I did to recover my files:

$ sudo testdisk /dev/sda5

I selected None as the partitioned media. And then, I didn’t see the undelete option, so I chose the List option.
And finally I moved to the path that my files got deleted, and I copy them all to my desktop, but when I open a file, no matter which file, the data is just random bytes. The data in the file is corrupted.

If I did something wrong, please guide me step by step how to do that, I had a lot of important projects ):

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I am using Ubuntu