You sell about $80,000 every 5 days (nearly $6 million annually) and you registered your domain with NameCHEAP? And your surprised that NameCHEAP hires CHEAP eastern european help? And you didn't pick a registrar with token-based 2FA? Or any security beyond knowing your name and DOB to start transferring domains out (which I don't believe).
The domain was registered many years before, but I agree I should have never gone with NameCheap in the first place. Another one much more reliable registrar is Marcaria, which went down price-wise since just few years ago.