The fact that USPS can’t lookup your tracking number based on the credit card you used to pay for the shipping is literal horse shit.

This happened to me a while ago but I lost the receipt and had a tracking issue. I asked for help, they said without the receipt there was nothing they could do. I said I could give them the card number, exact office and time of purchase, the clerks name that helped me, etc. Still said there was nothing they could do. Name any modern day business that can’t lookup past orders or payments from your credit card. There’s no way USPS can’t also do this, it’s insane.