HELP, HTC ONE M8 stucked with a custom recovery and no root!

a few months ago i decided to return stock to get the OTA update for lollipop, everything went good but the OTA update for 4.4.4 can't be installed I don't know why, after some attempts i got a custom recovery without the root impossibilited to return to stock recovery and with the 4.4.3 kitkat and 2.22.401.5 firmware... if someone can help me i'll appreciate