Bad service

I’ve recently had an experience at the Woolies in Grayston Shopping Centre where the price did not match the product non the less at the till the cashier gave a lot of attitude when I told her about the price then I took a picture where the product was and the manager told me I might have taken the pic from another store...I’m just ticked off with the fact that remarks was made from management becoz of the color of my skin and was told that I will get the product for free instead of being apologetic.