First thing that I would do is to spray some penetrant/lubricant into the tubing that the cable goes into/comes out of. Sometimes you can get these things loose by stepping on the e-brake repeatedly while activating the release mechanism. A 'quick fix' alternative is to see if you can get a hold of the cable with a pair of pliers (or the like) and then hit the pliers with a hammer forcing the cable back towards the front of the car. ( this worked for me once in a parking lot) Careful with the spray so you don't get any on the brake shoes/pads/rotor/drum.
ps: welcome to the "Shop"