Touch Screen freezed on updating

Hi! I bought a Kobo Touch a couple of months ago and the first time it booted it asked me to update the OS and that was it. Nothing else happened. The screen is showing the Updating sign and it's not responding. I've contacted Kobo and they told me to unfold a clip and use it in the back and nothing happened. The also told me to hold the home button while I slide the ON/OFF and again, nothing. I even tried to connect it to my PC but it's like it's dead.
Any help? Any ideas?

Thanks!