FNB Forex limits

Fnb allowed me to put my own international limit on my profile. And i was good with it. Now when i traveled i knew i will leave within those limits then boom my card got blocked while am still out of South Africa. And they tell me that the only way to resolve this is by visiting a branch. How do i travel back to SA if i cant buy the ticket. I cant buy airtime, i can't buy food, i am sruggling because FNB decided to make my life miserable. Wasn't this supposed to be reflected on my profile limits. Am really disappointed