Uber eats are *****s and *******

I had 2 orders, the one had 3items only the one was available Nd I never got the remaining funds, in the end the one item totalled R27 and Uber kept the other money, I had another order, that was R170 the store swopped out item and the order was slightly more and they deducted both amounts returning nothing to me, Uber eats owes me over R250 and I have been messaging on the app with not a single customer service agent reaches out. There's no number or email I use to compliance and attempt to get my money back.