Passer by comment

I visited Freshstop Highbury on Saturday to purchase a few Monsters. It was on promotion and I ought it good that I'll stock up seeing the price was at R9.99. Upon my arrival at the pay point, the manager walked past and looked at me and uttered the words 'it's 3 per customer'. I questioned this as there was no clear signage that stipulated this... The manager in return told me that it was listed/stated like that on the website. However nothing was on the site either and this made me wonder if the shop actually wanted the sale... I understand that any promotion leads to traffic through the door and ultimately sales and revenue. Why was I denied to purchase any amount of Monsters I see fit for later later consumption and also contribute towards the revenue and profits. I understand times are tough and sales are important but isn't the purpose of this to get more traffic and sales in your store so that all businesses can thrive under the uncertain and unfami**** times... I just find it harsh to mention something like that when you just passing by... disappointed in how this unfolded and the treatment I received at the pay point from the manager...