Default Help with RK29 tab

Hi there, i need help with a tablet that i just got bricked,its a Newsmy, not sure what model cause cant find it anywhere, i tried flashing a firmware for RK2918/30 using a tool called Rockchip Batch Tool but now i dont get anything on the screen and only get a Newpad icon on Windows 7 from inside storage when connecting usb cable, and also i cant switch it off or go back to 'service mode' so Rockchip Batch Tool wont even recognize the device ,any thoughts?? thanks