LOST TITLE DEED

FNB Home Loans Department lost the title deed to our house!? Due to this negligence, it will now delay the sale of our current house and the purchase of our new house, effectively meaning that we might only move in when my wife is 8.5 months pregnant. How is FNB going to rectify this absolutely negligent and unacceptable error??? The lawyers have worked tirelessly to speed up the process due to her pregnancy, only to find out at the last minute that FNB has lost our title deep. How does this even happen and why do we only find out about this now!? This could have been rectified in 2017.