Wet food received

My brother ordered Mc Donalds from UberEats yesterday, our order was received, with half a cream soda as it had spilled in the bike upon delivery. Being the case, all the other food had gotten soaked with cream soda, when we asked the driver what can be done, if we could receive new food, he said he could give us a discount of R7, and even that was alot, we then refused to pay for this order . I am trying to get a contact number for uber eats but cant seem to find one.