Impudence 15

Did the chair now for half a year and more recently just jammed the entire mechanism, that is, it can no longer be adjusted. Have contacted the manufacturer after which I now want to prove that the defect due to a production error was made and not by own fault. Is that a joke? I would probably own strength normally the mechanics of such a chair can not even damage so if I wanted. How does one prove in retrospect that because please ?? Get me still turn to Amazon or even my lawyer and otherwise the thing in the garbage. Taught me a lesson to think at least be able to expect a reasonable and generous customer in normal dimensions Service at this price, especially since I have this chair 2 times ... so unfortunately can only advise against the purchase!