Refusal of Purchase

I today visited Totalsports Mtubatuba Branch around 09h43 to buy a charger/ adaptor and it was priced R299.00 and I was told on the spot that the charger is now R350.00 but the price on the item says otherwise and when I asked for the manager I was told I cannot speak to the manager because the manager is not available and I was denied the purchase of the said item and I was told by the teller to leave the store as they are not going to sell to me at the price shown on the item.