Pathetic customer care

After paying for my plane ticket I received message that I have exceeded the international limit authorized on my FNB card. I've tried to call the number provided in the message numerous times and never got lucky to actually speak to somebody. I've sent email to *** only to get automated reply they'll get in contact within 2 working days. It's been 1 week now and nothing has happened. i can't pay some of my accounts now and not sure if I can use my card for my overseas trip. Major letdown by my favorite bank.