Changed AppleId

Did you change your existing Apple ID or create a new one? If you created a new one, what you need to do is a name change. If you did make a name change as opposed to a new Apple ID, you need to contact iTunes Support.

Apple ID Name Change

Apple ID email address or password - What to do after you change I suggest doing this before you change your Apple ID or password.

Scroll to the bottom of the page in the 2nd link.

iTunes Support

iTunes Support – world wide

First you are not talking directly to Apple here. We are all Apple-product users just like you.

Second, any purchases you make with an Apple ID is associated with that Apple ID. You would have to repurchase the same item when you use a different ID.