Eastern Halal Fresh Food

I walked in this shop the other day and bought a packet of rice, which clearly did not have price marked on it as well as no price on the shelf either.
I asked the guy at the till how much it was... he said £3.49 and i as have never bought this type of rice before, i did not realise how much i was paying for it.
but when i went to my local shop which is within a mile of this shop that same porduct was £1.89.
the funny thing was that i realised, was the guy hesitated for about 10seconds when i asked him for the price.
another incident.
i went to the same shop to buy some meat.
the same guy said it is £6.99 a kilo, so in total the weight came to 2.5 kilo.
so even if i was charged at £7.00 a kilo times that by 2.5 that equals to £17.50 but i got charged £20.00 and i have a receipt for it.
i just want to let people know that these people inside EASTERN HALAL FOOD 277 GRAYS INN ROAD, WC1, make up prices as they go according to whom the customer is.
and i think this wrong as a business should be the most honest, as majority customer expect a blind faith.
i would like to hear from the camden council about this, and what type of tenant they expect for a premesis like that.
please do not go there they will use u as a punter!
I would never ever in my life recommend people like to a friend as well as an enemy!