Downgrading my 5 star to a 1 star. How hard is it ...

Downgrading my 5 star to a 1 star. How hard is it to email someone a receipt? Literally been waiting 30 minutes now for the email at a FedEx. Incompetence is not something I have patience for. Had to call twice to make sure they got my email right and STILL no email. Definitely sticking to Marriott hotels.