Returning Xfinity Home Security Equipment

I discontinued my Xfinity Home Security service.  I was told to return Keypad, Touchscreen and Security Specific Router that they installed.  I returned them to the Factoria (Bellevue, Wa) Xfinity store on Sunday.  I was intercepted by an associate asking if I was returning the equipment I was carrying.  He told me that I would be sent a receipt by e-mail using the barcode on the touchscreen.  I have not yet received my receipt. 

When can I expect to see my receipt for the equipment?