Ignore case

is this an option to turn off for file downloads

What do you want to "turn off"?

When I download a file, I must match the case in my script or the download fails. For example in my script if I have get command for MyFile.zip and the file name on the server is myfile.zip, then the download will fail.

so I was asking is there a way to turn off or ignore case in file names

No. Most *nix servers are case sensitive. MyFile.zip and myfile.zip are different files.