Uber eats poor service delivery

I ordered a meal for delivery and it turned out the meal was missing a few items, I only noticed this after the uber driver had left right. So I emailed uber eats support because that's the only way we can communicate with them. I sent multiple emails with no response and eventually asked for a full refund and that they could collect the items that they had delivered. I only received a response the following day telling me that they have made an adjustment to the price for the items that were not delivered. No explanation whatsoever about what might have happened to the items. My issue is the principle of the matter. If an issue like that arises, like any other delivery service, I expect an apology with a reason as to why the order was incomplete!!! Don't expect me to just take an adjusted figure. That is not how you deal with customers. So everytime when items are missing they just throw you with a price adjustment and expect you to be okay with it?! Furthermore, I insisted on the full refund, either they give a full refund and collect what they delivered or they deliver the rest of the items that were missing. I was told that they cannot look further into the matter and from then onwards stopped responding to my emails. This is poor customer service at its best!