Replacing special Chars

I have many songs which have more as one artist or more as one genre. Most of them are separated by "; " (without quotation). But some of them are separated like these: "/" or "" or "//" or "\" while "/" and "//" was easy to replace with an action, it did not work for "" or "\".
I did use the simple replace (no regex, because I am unsure here what to use).

Has anyone an Idea what I can do here?

see here: