A lad I know had the same problem. His terrier dropped in and we got a phone call saying his dog was at eight foot in tough ground in an earth that was never deep. we drove half hour over to him and broke through half hour later at less than 4 foot. He has hellman now.
There is other options mammut, ortovox, pipes etc. You only need collar from bellman I think. Any issue I had with stuff from them they fixed to be fair.
Jigsaw not telling you your business but you would have to see the parents working. I have seen half a dozen or so in the field and what a disappointment each one was. Not saying good ones don't exist but I'd say proper stuff is on the endangered list.