Default Brick. Need Help Please

Ok, so i got the update OTA to 4.4 i think. I was rooted, but had stock recovery. The update failed. and when the tablet rebooted, the touchscreen no longer responds, and it stays stuck on lock screen. I cant boot into recover, when i try, it just shows an android, with an exclamation mark, and the string 'no command'. adb fastboot recovery command works, but no recovery. any other command, like fastboot flash w.e, say, waiting on device. Im out of ideas. Ive researched, i need help. please someone take pity on me. lol. Thanks.