Another network problem, and another graphics card

After buying a machine CSL Sprint 5766f (Quad) - AMD A8-6600K APU and made myself refunded because the map of network jack did not work, I meet again the same problem network motherboard socket, and in addition the DVI (video output on the motherboard) is defective (malformed original). I bought a graphics card rather than sending the machine because I really need. But the seller will not see me anymore, Second defective machine row, that's a lot: Where is the vaunted German quality in advertisements? The French ultimately quality is better!