No voucher will fix this mess! Don't soft soap me!

On Friday I saw the great special on Click Online Shopping for diapers. I placed my order with other items and make payment as well. I selected for the Click and Collect 24 hour Express service. 1) No where were I told/promted that it is only working days 2) At the time of order and payment there were still stock available. Saturday afternoon I checked my emails to see if it is ready for collection. Nothing. I though ok, I will go to the shop and try my luck. The shop knew nothing about my order. Come Monday, I phoned Customer Services and was only then informed that it is only working days. Ok so I accept it and then only searching the website find that clause in the FAQ's. Then to make matters worse, I receive an email to say part of my order was packed and shipped. Almost two hours later I receive an email from Darren in Customer Service to say that "was unfortunately not in stock at the time of packing your order and we therefore need to refund you" Now I feel this is the WORST service ever! When I placed my order and made payment, there was stock. Only on Monday after 14:00 - a full 72 hours after placing my order - was I informed there is no stock. Now I don't want a refund and I don't want a voucher. I want the product I paid for at the price I paid for. I looked to see if I can get a deal close to this but the closest I get is R349. That is a full R135 more expensive than what I originally paid for. I don't want a refund. I don't want an online voucher. I want the product i paid for at the price at which I paid for. I used the Online Service as I can not always get to the shop. Please accommodate me.