Top tile refuses to refund me

Top tile Edendale in pietermaritzburg refuses to refund me. I saw tiles that i liked and paid for them, befor receiving these tiles i realised by looking at my till slip that the price is hiked from the price agreed upon sale. So i then voiced my concern and asked that they return my funds, thats where the issue began. I was told to draft an email requesting for a refund, i have never heard of such but i did it anyway and i was told its going to take 2days for the funds to return to my account, its been 4days now and still no refund.