I think there’s a slight language barrier. QSC rep may not be Chinese but I don’t think their first language is English.
I believe what they were saying is that “we are the only Chinese source which works with janoshik test results at all…you can go to other sources, sure, but you’ll get even worse level of service than here. Because they outright state they don’t trust Janoshik test results at all.”
I might be overly generous but I think it’s reasonable to steel-man statements when there’s reasonable room for a little consideration / benefit of the doubt.
Also at this point, I suspect if this rep burns out, another will replace them from QSC.