Discount false advertising on UberEats

I purchased the Mochachos double chicken special as advertised. It was for R 69.90 and would have been AUTO app****. Surprise, surprise, the charge went of for R 89.90 - FULL price. I queried it with Ubereats on facebook, they requested me to Secure message some detail to them. Since yesterday no response and my Facebook post removed. That is OK as MR D also do the same, but I wanted to let the people know - be careful