It's bad of Gridseed to send you an old(not working ?) controller. But if the controller unit cost 67 usd and you need 1 unit for 10 gridseed miners i think the best thing to do might be to just order 1 (or 2) extra controller units that works for now and take that 67 usd cost, thats just 67/(160*10+67) 4% of the cost extra for that set of 10 miners, you can always try to argue with them about that later, the important thing for you is to get your miner up and working, 3 days of downtime for a set of 10 miners because of a bad controller is probably equal to the cost of an extra controller unit.