Invisible fence: Any suggestions?

[O2HeN2]

I've got some friends out in Black Forest (Colorado Springs) that had an old-tech invisible fence (that worked great) for years. After a hiatus of a couple years without dogs they got another dog and upgraded the invisible fence to the latest version. It's a smart fence that corrects upon exit, doesn't correct upon re-entry and sends a notification when the pet leaves the yard.

At least that's what it's supposed to do, it hasn't worked since day 1. They've now been struggling with it for months.

They're on their third base unit, diagnostics have been run on the buried line which all come back OK, hand testing the unit works but put it on the dog and it chases a squirrel to outside the fence and they receive no notification and as far as they can tell, no correction (if it had corrected, they would have received a notification).

Every time they report a problem they get a different person coming out to the house (they have gotten one guy twice, but that's it). So no continuity, no problem ownership and therefore no customer satisfaction.

Anyone have any experience with invisible fence and a GOOD tech that perhaps they could request by name before they just scrap the whole thing and put in a not-so invisible fence?

...or, even better, contact info for someone higher up in invisible fence that might just care about a customer?

O2