You need to wait until the weekend passes and the support dept is back to work.
For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat or phone option...
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I checked & found that the order was placed through Digital river so you have to contact support as mentioned above.
In case you find difficulty, please confirm by private messaging that you would like to cancel the CC purchased on 04/29/15
I will get that escalated for you.
Thanks the reply and support, had a chat with support representative and requested action taken.