My passport for mac won't export or mount after repair-unresponsive

I have been having issues with the connection on my passport and it disconnected without being properly ejected but when I tried to open it again it changed from the orange icon to a standard hard drive icon and I could no longer access it. I clicked on repair in disk utility and tried to mount it afterwards and it said it couldn’t mount it and to try running first aid even after I just did. I can open the “folder” on my desktop but it appears empty. How to I fix this? Is all my information erased?

Hello,

It is possible the partition is corrupted because it was not ejected properly. If this is the case you could probably recover the data if you use a data recovery software.

How to I get that and does it cost money?