ADIDAS poor and slow services.

On the 24th of November, I went to the Adidas branch in V&A Waterfront and when I got there I did not find the size I was looking for. The consultant at that branch suggested that I buy it using the Adidas app as I would also get a 20% discount. I bought the sneaker using the Adidas app but I did not get the 20% discount because the code that was sent to me was not working for some reason. I didn't mind that at the time because I really needed that sneaker. The consultant at the V&A Waterfront also told me that the delivery of my sneakers was gonna take 2 to 3 days and the date today is 05 December. In 3 day's time, it is going to be 2 weeks without having received my order and I cannot stress enough how disappointed I am in a international brand like Adidas to be providing such poor and slow services. I went as far as lying a complaint with Adidas via emais and they gave me a case number and said they are gonna get back to me within 2 to 4 days but I have been waiting for them to get back to me ever since.Ordering things online and using the apps is supposed to be easy and convenient but with the Adidas app it is actually the opposite.