There's a reason places like msy and similar are a heap cheaper than other places. Their customer service sucks, and getting them to diagnose or warranty things is a pain. It's just not what they do, at least not at the two stores local to me, and at their prices I don't expect them to do it. Like I said earlier, I wouldn't take a fuel pump back to autobarn for them to test.
No offence to anyone here, but everyone wants top dollar service and bottom dollar prices (myself included). There is value however in going to someone smaller and perhaps dearer, they probably would've tested the card on the spot for you and replaced it with no issue.