Unprofessional

Of recent I had 3 transaction which went off my Bank account which I have not authorized. I contacted the Support Team on the Bolt app and was advised by them, that they do not process refunds for unknown trips and that the breach did not happen on their side and they are not liable(but yet they can debit my acc?), was advised to contact my Bank to block my card. So Bolt can take my money yet they are not held liable for unknown trips, the public need to change to Uber or Didi and not use Bolt.