2012 Acadia Rear Gate

My 2012 Acadia Denali's rear gate will not stay up and slams shut violently upon raising up. There is no manual way to raise it up and it fell very hard on my shoulder unexpectedly. I contacted the dealer, who told me that there was a recall on that particular year, but there was no way to fix it right now. This is a very dangerous problem and I need my tailgate to lift, as I use it all the time for groceries, etc. Please contact me at