Shredded Grey 13pin cable....help!

catwoman13cats

Despite tucking the cable up well above the ground when we hooked up....got to St Andrews to discover the cable well and trully shredded. Have managed to tape up the wires that are exposed, black wire has gone totally........any ideas how much we'd be
looking at to replace this cable please? We are not having too much with this van and we only owned it 3weeks.....