How can I punish this Chinese audio dealer

I ordered three pairs of tubes from him last year.

The dealer used to respond to my e-mail within 2 days with fast shipping.

The Psavne Acme 805 tube went bad after 7 days of use.

But with claim of bad tube, he stopped responding to me at all..

I sent him 6 e-mail within 7 days.

Will Paypal refund be the best way to punish him?

[email protected]
수 2018-12-26, 오전 12:47

ok sir

[email protected]

From: Thomas Kong
Date: 2018-12-26 16:43
Subject: Re: Order Confirmation No: 11720
I received Acme 805 tube yesterday.

PSVANE Acme Serie 805 Vacuum Tube High-end tube Be

Please note that both tube are made by same company Psvane.

Cossor valve was league above from stock tube with refined bass and deeper bass.

As soon I replaced Cossor Valve 805 with Acme 805 today, I noticed clear window of transparency and more details.

It seem like I had inserted pre amp since the change was so drastic.

The soundstage got wider with 3-d holographic with clear window.

It had not been burnt yet so it may be possible to change its sound for the next 2 weeks.

But the first impression is very positive.

I will keep you informed of the progress.

I also have pair of NOS United 805 tubes which I had not used yet.

After Acme got fully broken in, I will also compare it with NOS United.

Order Confirmation

Thomas Kong,
Thanks for shopping with us today!
The following are the details of your order.

Order Number: 11720
Date Ordered: Thursday 20 December, 2018

1 xPSVANE Acme Serie 805 Vacuum Tube High-end tube Best Matched Pair (Psvane Acme Serie 805)$732.99 USD
---------Sub-Total:$732.99 USDFREE SHIPPING! (Free Shipping Delivery Charge.):$0.00 USDTotal:$732.99 USD

As usual, I expect you to ship it fast


United States
Payment Method
7aeeb429 76a8 4040 a90e 93802cf27573shkong78
@ elizabeth
You're probably right and they should be labeled JOS (Junk Old Stock).......Jim
I bought two kits full of bits and pieces and countless tubes at a garage sale. The old guy used to repair electronics as a service tech and carry these around in the van. The tubes are quite old and unopened in their individual boxes. If I were to sell them I would likely choose the term NOS as they are new in the box but 70 years old. How would you better identify them?
Is he actually a Korean dealer? Since I see Korean characters in the email you quoted. 
70 years old.. So you know he had them from day one? and just because they are nice old boxes, does not mean they were never opened and different tubes (used) placed in them. Sure CALLING THEM NOS is fine. but the fact is they are all used, maybe gently used, but USED.                
Then my comment about all that are left are the unwanted tubes!I guarantee folks bought cases and cases of tubes, selecting the best to use (up) and selling off the lesser ones. over and over. So now, IMO anything even remotely 'like new' is because they sounded like garbage back in the day.. OR, It got pulled from some organ, or other dead electronics in some old guys shop. (and put back into nice new looking boxes LOL)