Phone number issue

I was trying to play OW2 on an account I have, and I just swapped my old phone number from a seperate account over, but it now is giving me this message

“The attached mobile phone number has already been used to create a different overwatch game account. Please update your mobile phone number in battlenet account management or contact customer support”

Well I did both of those things, and Im no closer to figuring out what im supposed to do to play overwatch. Please help.