Groenkloof Spar prices

I shop there almost twice a day as I live and work in the area. Their prices does not match when paying at the till and the the label on the rack. I have taken this up with the Manager and even wrote an email on numerous occasions to Spar Sa. I have been contacted by both and both will endeavour to rectify this. I have not seen any improvement in the last six months and today the price on the Avo's were R4 different. I do buy at other Spars and have not had this experience. I even challenged the manager to take a test and found that the barcode does not correspond with the item on the rack