Changing specials as they deem fit

I ordered a sunrise breakfast from the Brooklyn Wimpy for delivery this morning. I was informed that the free coffee as stated on the website is not included with deliveries and that this is stated in the terms and conditions of the promotion on the website. I informed him that it does not state this on the website - his answer was sorry. So I did not get the coffee that I was supposed to get. If this is only for sit down you should STATE that on the website! I ordered two extra hash brown sticks with my order. When my order came there was no extra hash brown sticks. I phoned Wimpy and they said they will bring me my hash brown sticks. An hour later my hash brown sticks were still not delivered. When I phoned yet again he said that he will not be sending them as I did no pay for same. I informed him that I was charged R30 whilst the promotion is for R24.90 so then I want my extra R5 back. He refused stating that the price for the special is R30 when its not sit down. This is NOT STATED on the website. We order Wimpy for delivery every week. The prices are ALWAYS the same whether its delivery or sit down. I refuse to pay more if its not stated on your website's ts&cs!