Why do customers get penalised for restaurant mistakes?

I ordered the same burger twice from Fatboy Burgers, a morning heart attack burger. The first time I received a single patty burger however it was supposed to be a triple patty burger. I got refunded for the incorrect order. The burger was delicious hence I ordered the second time wanting the original triple patty burger, but the burger again came with one patty. Now UberEats doesn’t want to refund me. They are penalising me instead of addressing the issue with the restaurant.

It seems that UberEats protects restaurants and drivers but not their customers.