Thanks for contacting us. I understand that you haven’t been able to download songs on your phone as you were prompted that you need to wait for 78 days. I know how important it is to be able to enjoy your songs on your device. I will certainly assist you today.
I've removed your device from your Apple ID. You can now associate the device with the Apple ID you intend to use.
After you associate a device with your Apple ID, you can't associate that device with another Apple ID for 90 days.
For more information on managing your associated devices in iTunes, see this page: