Sorry to hear you had problems. To buy in good faith and then not have get the same from the seller really is the pits!!
However, as a user of Bartolini (actually Hi-A) in my '61 P for over 30 years, I would encourage you to try again if you are looking for a very round, warm sound. No grit, no growl. Works for me.
did you have a preamp and new battery?
i scored a free set of emgs waay back when some random thought his pickups were dead after he left his bass plugged in overnight;ha;
for the record, nowadays i would 've told him the problem...........then again,maybe not.
However, as a user of Bartolini (actually Hi-A) in my '61 P for over 30 years...
Here's my '76 Hi-A Mini Beastie that I had in the bridge position of my '73 Ric. What a great little pickup. Bartolini's new Classic bass series sound like the old H-A pickups. Nice full range tone.