Some merchants are setup for an automatic crediting, while others are manually approved. Before you submit a support ticket, allow 3 weeks for the cash back to credit and if it does not then go right ahead a submit the ticket. Good luck!
I am having similar problems with this site and their cashback. I am waiting another week and contacting support about this. I don`t understand why we are all having problems with this! Hopefully they can straighten this out!