Hello Temsayah,
You've done some great troubleshooting so far. Next, we suggest making sure that there aren't any restrictions set up in iTunes:
1.) In the iTunes app on your PC, choose Edit > Preferences, then click Restrictions.
2.) If the lock at the bottom left is locked , click it and type your administrator password.
3.) To block access to specific iTunes features, including the iTunes Store, select one or more of the checkboxes in the Disable section.
4.) If you want to set privileges for a store in a different country or region, choose it from the “Ratings for” pop-up menu.
5.) Select one or more of the checkboxes in the Restrict section.
The restrictions available depend on which store you use. In the U.S. iTunes Store, you can prevent anyone using your computer from previewing or buying:
6.) Click the lock.
Restrict explicit content in iTunes on PC - Apple Support
If that doesn't help, can you let us know what happens when you try to play those radio stations? Are you getting a specific error message? If so, what does it say?
Take care!