Sale items kept aside for special customers

I went to Topshop Menlyn for Black Friday. There was a dress i had been eyeing for a while and it was on sale but I wanted a size 8 and there was no size 8 on the rails so I went to enquire at the till if there was any chance of getting the right size dress. It was my lucky day because the lady (Athachia Mashele: name on my till slip)was about to give me the right size dress from a pile of clothes behind the counter when the lady at the next till said "no! That dress is for another customer".

Now my issue is that I'm also a customer and I wanted to buy the dress immediately. How come the dress was kept aside for that customer? And how did they come about the decision to keep the dress for whoever.

So I left my no.s with Atharchia that if the "special customer " does not come for the dress they must call me and I would come back for the dress....to no avail. When it was getting to 5pm and the shop still hadn't called I took the liberty to call myself and the lady I spoke to said they were very busy and she would get Atharchia to call me and nobody got back to me.

Now I'm just wondering what time the customer came for the dress? If they came for it at all!? And why they deserved the special treatment of sale items being kept especially for them?!?