Astra j bonnet won't open help

[Boris.t]

Get someone to pull the lever as you put pressure on the bonnet, mate. If that doesn't work, look for the cable that attaches to your bonnet release lever. It's out there in the open, no need to remove any plastics. You can pull on it hard with some pliers and that should get you sorted. Once you (hopefully) get it opened, take a look at the latch mechanism and springs. I wouldn't be surprised if it's gunked up and given the weather lately - frozen stiff as a result. You might try cleaning/lubing it as a long-term fix.