The issue is likely in the formatting of the file during its opening with Excel. In this case, we suggest you follow the below steps:
Click on "Data".
Select "Get Data", "From File" -> "From Text/CSV."
Choose your file and click "Import."
Verify that the file origin is UTF-8 and the delimiter is a semicolon, then click "Load."
Et voila!
Keywords: .CSV file, Excel, unreadable, formatting