Petro Canada review: Gas prices

I have been going to this petro can for some time now...In the past few months they keep raising their prices by 10 cents a liter over every other gas station in nanaimo bc even the other petro can gas are 10 cents lower I have questioned the staff and they say it's petro canada telling them to do it... It's obviously the owner setting the price and this is unacceptable.. I have been a petro customer for years and I am seriously considering changing stations... And they advertise 10 cents less on google maps.. Right now it's 129.9... Everywhere else is 119.9