Standard Bank refuses to assist me while abroad!

I’ve been a long serving 10+ years loyal Standard Bank client and the service I’ve received while abroad is **********. I’ve been abroad in the USA where my credit card has been blocked due to the suspicious location of the transaction. I’ve been attempting to contact the ***** department for weeks now to unblock my card, I’ve just not received a response. It’s been the most frustrating experience. I can’t make international calls unfortunately, so emailing is my only option (since their chat option on the Standard Bank App is absolutely useless as no agent ever gets assigned). Is the ***** department always this bad with their responses? If my card had been lost or ******, my credit limit would long time be exceeded by the ***** due to the departments lack of response and unwillingness to help!!!