Bad Online Shopping Experience

I ordered one shirt online on 29 September 2018. On the 19 October 2018 I had still not heard anything, so I went Mrp Quagga Centre (where the shirt was suppose to be delivered), the shirt was not there, so the lady who checked for me was very helpful, phoned where ever the shirt is supposed to be delivered from, finding out were my order is, as it is past the 7 working days I was told it was going to take. Eventually she got off the phone and let me know there was a mess up, it will be there by Friday 26.10.2018, which is fine these things happen and she went out of her way to help me. I go back the next Sunday 28.10.2018 to collect my shirt, I get there a guy looks for the package still has not arrived, and that I will receive a message when it's there... It has now been 3 Weeks after I should have originally received my shirt and still nothing!