Jim - at this point I assume you have received your misrepresented as NOS, used tubes back.
A bit of advice -
1. NOS tubes generally have uniformly tarnished pins. If a tube's pins are tarnished with untarnished rings in the middle, it is an indication of long term use. Access to a tester verified their used status under asymmetrical use with one section on the verge of failure and the other, not that far behind.
2. If someone asks specifically to send via UPS or USPS as DHL and FedEx will leave them outside, even if a signature is requested, don't send them via FedEx anyway.
3. Learn the difference between fault and responsibility. Even if you were unaware that the tubes were not NOS, it is still your responsibility, and an adult should show some level of contrition and apologize, not respond with
Sorry this didn't work out. 