Bricked refurbished LG G2. Don't know what to do.

I bought lg g2 labelled as d802 and i updated it to lollipop with kdz method. Phone successfully updated but touch screen went crazy and there was no network. I have searched several forums and found that my lg g2 is not actually a d802, and then i open my phone battery cover and found it is a d800. Then i followed this tutorial and I bricked my refurbished lg g2 :( and now there is no fastboot, no recovery mode, no QHSUSB_BULK, only download mode ''blue circles'' but not in firmware upgrade section. Stuck at boot loop only LG logo appears and nothing happen. Computer doesn't recognize, no connecting sound in windows.
Anyone can help me, I don't know what should i do now? :o

Thanks.