Appalling Attitude from Manager

Purchased a groupon, we only realised at the restaurant the groupon had to be printed. Immediately spoke to assistant manager to get some sort of assistance. He said we could not email the groupon to him nor was the printer working which is a joke for a restaurant as big as Adega. My partner drove at 7pm that evening to work to print the voucher as he was adamant he would not even confirm our order until she arrived even though I waited at Adega, she got back at 8 the order came 30 minutes later the prawns were bitter. I am absolutely disgusted with the poor pathetic service we have received and the way in which were treated by the assistant manager. We will never go back to Adega and make it a point to tell everyone we know of the lack of professionalism, service and courtesy. It is unacceptable for any customer to have gone through what we did and it is appalling that instead of possibly coming to some sort of solution their only option was for us to find a place to print out the voucher when all you really require is the voucher code on the app/email as the groupon is already paid for. Partner emailed Randburg and Head office on Monday we still waiting for a response!