Standard Bank Blocked my card while overseas

Before i left South Africa to go to the USA on business i phoned Standard bank card division to notify them that i'm going to travel from the 10th of February until the 23rd of March and they gave me a reference number. Ok, i wanted to use my card to pay for a Hotel room and the transaction got declined, NO hotel room for me and its -28 degrees Celsius outside and snowing. I phoned the toll free number which is not a free call from the USA to RSA costing me R34 per minute, after 11min 46sec i hanged up no answer. I phoned the card divisions International general inquiries 15min 44sec on that phone call. They told me that the card is blocked even though i made arrangements, the end if the call ended like: \ please give my supervisor a call on Monday they will help you"So here is my thing do i have to wait 26 hours to phone them again costing me even more money"