That makes sense.; it's a Google Checkout transaction, irrespective of how you tendered payment to Google Checkout.
Well, there is your response. It sounds like the "right department" has not been able to help you on Saturday or Sunday, or they have no news for you as they are still processing the Google Checkout payment.
As others have mentioned before, anecdotal evidence on these forums indicates that Google Checkout can take several days to process. In your case, it's only been somewhere between 2 and 3 days (between 48 and 72 hours) and the overwhelming majority of that time has been over a weekend.
I know you are frustrated, but at the end of the day, "it is what it is". You can always send more support requests, but what you do you really think they will be able to tell you until sometime during the next business day (on Monday PDT)?