Wow, this happens. Have also been undercharged at grocery also.
Would not waste time on vacation for 8 bucks. How much did you lose in time and gas.......😬
First if all, it was the principal and if it is happening to one person, it is likely happening to others.
Regarding gas and time...we had a beach day planned at Mullet Bay for Tuesday so going to Carrefour at Porto Cupecoy was less than 5 minutes out of my way. 10 minutes total time and almost no extra gas used.
Your choice as to how you would have handled it and this was my choice.