I have noticed several ringtones with no or wrong song artist or misspelled words. Even some with the wrong song title.
For example there are several ringtones that say "Grease", but they are all "You're the one that I want". The song "Grease" isn't actually on here. Also I saw "Cats in the Cradel" by Jim Croce. It should be "Cats in the Cradle" by Harry Chapin.

Is there anywhere to submit a request to change them?

I saw a place to download notifications on the app of mobiles24, but not the website. The app kept crashing and I took it off my phone.