False advertising

This is really upsetting, you sent me a confirmation of my order yesterday to say I will receive it on the 3rd of August. I am at home waiting for the delivery and you are now sending me a message saying one of my items is not available in stock. What on earth am I supposed to do now? I have been calling all morning and trying to get someone to add any similar juice that you have in stock but all im told is that the refund has been issued The same refund that will take 7 to 10 working days, are you having a laugh? Is this some kind of joke? & to 10 days i must not pack juice for my kid. Why confirm everything and saying its going to be delivered when you dont even have all the products in stock. If i order again now im paying for the delivery fee all over again. You are becoming a very big disappointment and I'm talking to your agents on the phone and all they can say is sorry. Sorry doesn't fix anything. The order was still in store, add similar juice but no you cant even do that. I'm disgusted and really tired of your poor service, this is the second time this has happened. What make us pay for something that's not in stock its ****ing me off