credit card cancellation

I work outside of RSA and work out 3 months at a time. my main access to money is through my FNB Gold credit card. Upon arriving overseas i logged onto FNB app and was told i was able to upgrade to a FNB Premier Credit Card, naturally i thought this was a good idea, so i proceeded unknowingly. After a week or so i get called by Courier service to get card delivered to me, i informed them that i will only be coming back to south in a couple of months, the gentlemen rep**** saying no problem we will deliver to the branch, i gave him the branch and no issues. while this was going on i noticed on my internet banking that the credit card was now listed, awesome. Assuming that FNB had a procedure in place that would keep my gold credit card active until the new credit card was collected and activated by myself, unfortunately this is not the case as i found out the hard way. My Gold credit card was cancelled and i was stuck in a foreign country with no access to money, so i immediately called FNB Credit Card customer care, i explained my story and after holding and getting transferred multiple times, I got told there was nothing they can do for me. FNB Please help me, i'm a customer.