Sent followup email and no response

I placed an order on Wednesday 9 September 2015 and followed up on Monday 14 September. During the conversation, I was told that my order hadn't been packed yet and would be dispatched the following day (Delivery is supposed to be 1-3 working days?). I received my order on Wednesday 16 September. When I looked at the item on the site again, I saw that the item I ordered was now R270 less than my original order. I understand that prices are subject to change, but If I had ordered on Monday (when I had to follow up), I would have paid the reduced price and delivery would possibly have been within1-3 working days.<br> <br> I sent a mail to FirstShop about the above, and asked for a credit or refund for the difference, but have received no response.