Heritage COOP Strathclair in Strathclair (46 Main St)

I pulled up to fill When the price on the gas sign was 123.9. The gas price on the pump was 123.9. As soon as I put the nozzle into my car and click the on button to start to fill the price went up to 132.9. I went inside to ask the guy what was going on and he said I can't help at the price just went up. He literally saw me pull up and increased the price