I had a similar problem recently. I had a flat battery, tried to open the bonnet to charge it but the bonnet release cable snapped off near the bonnet release catch so was unable to open the bonnet. Luckily, I have Home Start Cover with Green Flag so called them out. They opened the bonnet by unbolting everything from underneath and then jump started the engine. I then went to the Ford dealer to get a price for replacing the cable. The new cable assembly was about