I don't know what to do! I recently had to change my payment information on Coursera and I didn't realize that deleting my current card would withdraw all my classes?? I thought I was able to simply delete the existing card and add another, but now that I have changed it suddenly all my courses are not on my list, on my history--nothing. I can't find any coursera customer service number to call, the chat is non-existing, please please please help!!!!!