Wrong order with lesser value received

I placed an order on 15 December via Uber eats. The wrong order was received. It's been over 2 hours of frustration trying to get the store to rectify this. I don't know what I am supposed to be doing with the wrong order. I don't want it. My order was over R300. I can't get hold of the store as the number is not going through. Customer care is lso not helping, I've now exhausted my airtime thanks to KFC