GYFT Will not return calls after purchasing cards that can't be redeemed. Took my money, no refund! Mountain View California

GYFT came installed on my phone and was recommended via Verizon. I purchased 4 different cards for family gifts, and none were able to redeem them. It has been over a year for two of them, 5 months for the other two - They tried for weeks, sent emails to support and nothing. I finally called and am getting the run around for over a week. Told there is NOTHING THEY CAN DO - my request is being sent to Management - can't speak to anyone, and NO ONE HAS CONTACTED ME as promised 3 times. Rep told me she would be fired if she gave me any info re: management. They had no problem taking my $175, but trying to get it back.... probably not likely. DO NOT USE THIS SERVICE