Call your local LE and the Secret Service office. Tell them there's a wireless skimmer on the pumps. They'll come out and seize/analyze it.
You should call Shell too.
""I learned in chemistry class that alcohol IS a solution."
Sniper Truth - "If you heard my shot, you weren't the target"
My four food groups - Caffeine, Nicotine, Fat, Cholesterol.
"The thing about quotes on the Internet is you can't confirm their validity" - Abraham Lincoln