How can I find an old iPhone receipt using my Apple Account?

she apparently dosent know the passcode? and to be honest i think her friend had been tinkering with it so who knows what was done to the phone, as i said i have looked through all my apple purchases as it was years ago that i bought the phone and had always kept it as a back up if i lost my new phone. Very annoyed at my so called friend who is not really my friend anymore as i gave her the phone when hers was broken she said she would buy it then gave it back a month later saying she didnt want it and didnt pay me for it and i cant even get into it - ****** off