Similar just happened to me. I paid my Gas account and the receipt page (email / print) option briefly opened and before I could choose an option, the page went to a survey. I tried to go back but it wouldn't allow. Just kept opening the survey page. I tried to find a receipt option in my account, but there doesn't seem to be one. I ended up using snipping tool to save an image of the pending payment. This wasn't an issue when I paid my last electricity bill.
