Hatsan USA's Phone # 1.877.278.4448
It's listed at the top/center of all of their main pages..
https://hatsanairgunsusa.com/ Willy, as for the 'coupon', that was probably only intended for a promotion of some sorts..
I've never heard of something that like actually being 'needed' otherwise..
I hope you were dealing with Hatsan USA's official page..
You mentioned 'them' having your *credit card number, *And PIN?
Hopefully you are referring to the "CVV code" [the 3-digit # on the back]
That's the Card-Verification-Value, used for security purposes..
The "PIN* - That should never be asked, required, or given out..
That'd be the top scret four digit # you use Personally for the card..
[If that # gets out, I'd be changing it ASAP or canceling the card]
Just a heads up
Sam -