Default Wrong recovery Flashed, bootloop

So, I have was flashing TWRP recovery, everything went fine, restarted the tablet and it is stuck in the boot loop.... Then I looked into then computer and I saw i have flashed the oldest version of TWRP for ICS (and i had JB bootloader)... Now It is stuck in a boot loop and i cant even acces fastboot... I am gonna leave it like this to let it drain the battery and hope i can turn it on by holding the power + VOL - button. I am such a dic*head.... Is it recoverable? Please say it is, It was an expensive tablet and i dont wanna lose it.
EDIT: Battery drained, charged again, tried turning on with - VOLUME pressed and I just cant get to fastboot...

Please help me
thanks