Promises / Promises

I called Firstshop last Friday asking regarding an item that was urgently required. I was promised that the item should be at their warehouse on Monday 24.08.2015 and ready for collection. I called on Monday and spoke to Nikki who said to me that the item was not there and the person who told me that it would be ready on Monday was wrong. She said that she would mark it as urgent and that the WORST case scenario was that I would receive it on the next day, being Tuesday, 25.08.2015. When I call in on Tuesday I get told a different story, with the initial story being changed to a blatant lie. I got a bad attitude. I then asked to speak to her boss and she put me through to Lance. Again, from his side, I got bad attitude. He spoke while I was speaking and at times refused to listen but rather say to me, \Well the bottom line is .... "No offer of apology. I will never use them again"