Fishaway's lousy customer service

On Friday the 30th of April I bought on the fishaways app a meal costing R154.90 including delivery fee from Fishaways Dainfern Square. We waited 2 hours for our meal, and I had to be the one doing the calling to find out where our meal is. When it eventually came, it was the wrong meal and which probably cost a 3rd of what we had paid and the driver said he took what he was given. We ate the meal coz we were starving by then but we took a pic of it which we mailed to fishaways when raising a complaint (after we tried numerous times to call them). I sent an email to the fishaways email address, wrote a review on their Facebook page, inboxed them on Facebook and all they've done in the past 2 weeks is ask for my number and say they are investigating the matter. Really it takes them 2 weeks to investigate about a meal for a lousy R154.90? Is that not even worse customer service than what that Dainfern Square fishaways provided?!