Leaking and sold for stupid

The faucet was leaking, directly at Hahn. When I reported this to the seller I was asked if I have the right tightened him. So first the faucet has been installed by an expert and the second I'm a mechanic by profession and therefore know something about technology. And that has nothing to do with tightening the tightness at this point. After two more such questions I was finally able to return the faucet and have the money reimbursed. That's why two stars but certainly not for the faucet.