Discovery Bank Thumbs down

Ive held a Discovery Credit Card for about 5 years now without any real problems. Since 23 May when the administration of the card was moved from FNB to this new Discovery Bank, everything has bombed. Email service has ceased. Phone calls take 15min or longer to be answered. I have called maybe 10 times over a simple OTP issue which still has not been resolved. My OTP would come via email, but that has stopped for some reason.