Hi guys
I have a D3 coming in late November

Bitmain was politically incorrect with us...when they launched the D3, it produced $200 a day...Bitmain thought first at his farm and after delivered the D3 to buyers...in late November the D3 will be a product that
not have a ROI, they should refund or deliver us a powerful D3 (at least 30 Gh/S)...or ask us if we can choose a future powerful version of the D3 or another Bitmain asic. I'm very angry with them, I will never buy again from Bitmain

Well mate you have high expectations from a business company which only cares about money.
you should not be expecting that some "kind" people will send you money making machines which will ROI for you in less than a year and be 100% sure about that.
Actually if you made some research before buying you might have decided against buying or simply resold it on market with about 2x of its price