Poor customer service

I received a message from FNB telling me that my limit for offs**** purchases was reached and was then blocked. They said that I must call ********** 442 to fix the issue or send a mail. They never reply to my mails so I called them today (12/06/2019) for 30 mins and they cut me off (or maybe the line). I called again right after and I was waiting on the line for almost 3 hours. Their service is not up to standard. Don’t give out contact numbers if you don’t intent on answering them. In the meantime, I can’t pay any of my subscriptions like Microsoft Office, iTunes and others. I can’t even pay for Uber. That’s really unacceptable