You do realize this is a criminal enterprise we are talking about here right?
Not trying to be a dick, but talking about "guarantees" and "bad customer service" from your Chinese supplier of illegal drugs doesn't make much sense.
These things are nothing but marketing gimmicks, not unlike the "purity seals" and "holograms" etc on Pharmacom's stuff.
These are not legit operations either medically or commercially speaking.
Considering all of these things were quite well known and posted here repeatedly when you made your order, the only thing to say that hasn't been said a billion times in this very thread (again, before you ordered) is:
Caveat emptor.