How Can I Change My Account Name/ DoB

[Yan]

Hey, I have a problem. it's not major but my dad made my phone account when I was younger. he did it under his name. But I pay for my own bills and I cannot change my name or my DoB and the website said to Customer services. My question is how can I change to me?

[MI5]

Going back a few years a call to customer service was all that was needed to transfer a contract to someone else, but for some reason, they stopped allowing it.
You can still do it for business accounts but not personal ones.