Apple ID

I am trying to buy a song on iTunes for a video that I am creating on iMovie. The problem is, that my old iTunes account is disabled and I cannot get into it to fix it. Also, I have tried signing in with my new AppleID, but only my icloud will allow me to log onto my new ID, and not my iTunes account. I cant seem to get out of my old iTunes account, but I'm trying to find other ways to buy music because I am on a time constraint for the project I am working on. Any help would be much appreciated :)