The only thing I can tell you is to use a "slim Jim". This is a tool used to unlock locked cars. Even then it is very difficult especially for someone who has never done this. This tool is available at auto parts stores. Another thing you can do is call a tow company and ask if they have the equipment and knowledge to do this. Many tow companies do especially the ones who do police towing.
I know this isn't much but I hope it helps and you accept.