foreach ($cardsNotStored as $cardNotStored) {
    	$this->entityManager->beginTransaction();
        try {
            $paymentMethod = $this->store($cardNotStored);
            $this->entityManager->flush();
            $this->entityManager->commit();
            } catch (UniqueConstraintViolationException $e) {
                $this->entityManager->rollBack();
            }
    }