This is what I use... Again, too late for you. It grabs into the filter, the tighter you turn, the tighter it gets. sears.
Maybe try some heat??? Might be kind of dangerous, but if it's been sitting for a while, most of the oil should be dripped off. Nevermind....
:Eye:...Try a chisel. Use the chisel on the base plate from the side of the filter, if you can, and point it in the direction you want to turn. Make a notch for it by hammering it once or twice straight on, then move the chisel and strike at an angle to make it turn. That makes a cheap impact wrench in a fix. Pound it hard 50 or 100 times even if it's not moving.:deadhorse: