Burger King and Uber Eats

I ordered a burger king burger with 3 extra items via Uber Eats from Burger King Rivonia/Illovo branch in Johannesburg. Burger got delivered without the extra 3 items. Called Burger King customer care and they refered me back to the Uber App to rectify their mistake. Did that, and got an email from uber eats saying I will only get a refund the extra items within 3 to 10 working days. Called Burger King customer care back again and Paula, the woman I spoke to, took NO responsibility with regards to sorting the matter out immediately and she expressed that this is an Uber Eats's problem. I told her that Uber Eats will only give me a refund in 3 or 10 working days and I want to eat now, hence I order their fast food for delivery. She said that Burger King does not take any responsibility for their order errors. I asked for her to put me through to the supervisor, but she refused. I asked for Burger King branch number in Johannesburg illovo's, but she refused to give me their number. In essence Burger King will easily shift blame to the delivery company for their mess up and they are not willing to take the responsibility of rectifying customer orders.