BP GARAGE LE ROUX DRIVE MIDRAND

I have a terrible experience with this garage every single day when i go in to purchase a loaf of bread.The price of the bread will not be indicated on the shelf but when you get to the till the price escalates tremendously every single day.On friday I paid R16.50 for a loaf of blue ribbon white bread.Yesterday when i got there the bread was R22.00.The manager of the store says its not in his hands.I am curious to know whether they are putting a huge mark up to rip customers off or is this regulated price issued by blue ribbon.Its absolutely ridiculous.This is the BP Garage on Le Roux drive Midrand. These garage stores need to be invetsigated the way they rip poor people off.