Don't expect Lowes to be better than Home Depot... These two, Sears and others, are acting merely as middleman. That means: they hire the cheapest contractors, most of which can't make a living on their own, due to poor workmanship, lack of experience, lousy service and whatever else it takes to fail in business.
Contact old time carpet layers, if you can find any. In the last 20 years or so, they disappeared, as the carpet business dried up, when laminate took over.
Tip: try carpet cleaners and laminate layers too.