Recovering old ID
So I was using iPhone 5s long back and had made Apple ID using my mobile number, years later I bought an iPad and made new Apple ID in it and started using it only to realise I cannot add that phone number to this new account which I wanted to do because I had purchases from new account. So I permanently deleted the old Apple ID which was my phone number thinking I’ll be able to add that same phone number to my new account but after 2 months I still can not add that number and getting the error that it can not verify that number, what should I do now I am buying a new iPhone which needs that number to be added to the account to use iMessage and FaceTime.
iPad Air, iPadOS 15