This sounds bad.

I do not want to judge whether you're a paid shill from a competitor (sorry, but not impossible) trying to make KnCMiner just look bad, or you are really suffering and its caused by things out of your sphere of influence.

If first case matches, we will discover it soon - no worries.
If second case matches I'm wondering about the exact words chosen when you communicated with them. May I ask you to share your correspondence, please ? It may help to clarify the issue and prevent similar experiences in the future (improve the situation for all of us).

However when you pay in BTC through Bitpay, then KnCMiner receives $ - so why a BTC to refund?
Prices in the shop are in $ as well, not in BTC.
When I transfer from my € bank account to their $ bank account some money, they receive in this case $ as well and they will refund the dollars as well.
Depending on the €/$ exchange rate I may have suffered a loss when requesting a refund.
So, no difference to BTC payments, but nobody complains as the changes in €/$ rate are tiny.

From my personal experience I can confirm that the support team is friendly, tries to resolve your issues, but ok - they may take up to 3 days when there's a lot of ppl mailing them.
I give them from my personal experience 8/10 for customer support and 11/10 for the incredible hardware.


*edit:
I'm wondering how you define the meaning of the word 'SCAM'. We obviously understand sth. completely different
For me a scam is: faked identity, smoke and mirrors, bad intentions, lies, misleading, sucking your money with no possibilities of refund at all, disappearing with less or no traces, but for sure not a legit company with several thousand happy customers worldwide you can visit during business hours and have a talk, in addition they offer refunds
This leads me to the assumption that you do better in staying stealth regarding your identity, as they might sue you for calumny, which is indeed a crime btw.