There is a double fence (with a 5 inch gap between) on one long side of my new garden - I don't know why this fence is double, I have never seen such a thing. There was a huge Russian Vine growing up both sides of this fence. The neighbours have cut off everything their side and I have cut off everything my side and put stump killer on anything remaining. The problem is, the Russian Vine is thriving within the double fence - it is packed solid with it! How can I kill it?