i want to delete an id apple

hi,

i have an apple id i created years ago with the my current email address. for years i couldnt log into that account so i created one with an email address i dont use.

now i want to delete the first apple id i created so i can use my email address in the apple account i currently use.

i tried to change the apple id and email on the first one so i can use it on the other account, but it didnt work. it still says that the email is used in another account.