Call Centre on an Infinite Loop!

I was attempting to make a payment online using my credit card and got a SMS with "...declined due to a technical error. Please call the number at the back of your card". I called the number and everytime I tried to get through to a consultant went back into the make a selection loop. Even when choosing one of the options it would then loop back into the orginal make a selection loop. I attempted to call the international number and the same loop occurred. I tried a different number and the same loop occurred just asking me to make a selection. I just want to talk to someone to resolve why my card isn't working.