Uber deceit - here is what we can call you from now on.

I placed an order for a vegetarian meal. 30 minutes later, the assigned driver messages me to say the store does not have any vegetarian option (note, not the store). He told me I need to cancel my order which I did. Uber is now not refunding me because I cancelled when the (non-existent vegetarian) food had already been prepared. I called the store and they confirmed that they do not have stock. So why must I pay for it if it was never prepared in the first place. I want a full refund.