That's terrible! If you want to spend some time working on it, I've fixed damage like this before. You need a car body hammer, and a hand-anvil metal block to hold on the other side of the mesh. If needed to go that far, use pliers to bend the torn mesh flaps close together. Use the block and hammer to re-flatten them as best you can. Hopefully they didn't actually stretch too much, if so, just overlap carefully. Then, use picture hanging wire to stitch them back together. Then you can spray paint over the stitched area, and it'll not be very noticeable at all.
Not only that, but if you spend a little time and do it carefully, it won't make a whole lot of difference signal-wise.