Instructions on voiding a label don't work

[williealire]

I purchased a mailing label by mistake from USPS and I tired to void it with their directions from their page with any results. Can anyone help me get this voided? Thank you

[kernowlass]

@williealire 

Be quick as its time sensitive as per opening lines in link.

https://www.paypal.com/us/smarthelp/article/how-do-i-void-a-ups-or-usps-label-i-created-with-paypal-...