Ok, you might be lucky then, most probably something went wrong during flashing and you can just flash a new firmware again.
These are the steps you need to take.
First you need to manually put your device in DFU mode like this:
1) disconnect USB
2) keep all 3 buttons pressed and connect the USB. LED will be white
3) Wait about 7 seconds before releasing ONLY the power button. Led will turn blue-ish green
4) Wait again 7 seconds and release ONLY the middle button. Now the LED will start flashing like crazy and you're in DFU mode.
Now, download my flasher tool: http://forum.pimaxvr.com/t/pimax-flashertool-by-sjefdeklerk/1968 (it's better than the one you were using, so use my version)
It will detect the device in DFU mode now and you can click the flash FW button !
In this topic you will find a zip with all FW's: http://forum.pimaxvr.com/t/firmware-direct-downloads/1688/5?u=sjefdeklerk
Goodluck ! I think it will work because the only reason this won't work is if your hardware is damaged. But in that case you wouldn't have been able to use the PIMAX before. Most likely the piplay software was trying to flash a FW and got interrupted or the process failed for whatever reason. In that case you will be back online soon !