DISCOVERY BANK COMPLETELY USELESS.

I have had *****ulent activity on my account for nearly 2 weeks, with a company already taking money out of my credit card, discovery bank then blocking my card. The company has continued to try take 150USD out of my account multiple times since. I have phoned Discovery over 20 times. I've spent hundreds of rands of airtime trying to get through to someone. No one EVER answers their ***** line. I've sent multiple emails. No one ever gets back to me. No one has tried contacting me. How do I go about getting through to anyone at Discovery bank? I need to book flights and I'm scared to unblock my card on the app as there are still multiple attempts of money being taken out of my account.