FNB duped me with a new credit card

I received a few calls in late November regarding the upgradingof my accounts, including my credit card. Both cards arrived in late December. My credit card statement online still shows two credit card accounts, not one. I called the FNB call centre and was told that it would take 90 days for the old credit card account to close. This doesn’t make any sense. I also don’t know what I am owing on my credit card account. Please can someone help me.