most appalling customer service

I am having the most unpleasant experience with sportscence. On the 3rd of August 2019 I ordered two items online, and on the 7th of August 2019, I received one of the items ordered. To this day I have not received my other item, even after calling sportscene online division and getting assurance from Rihanna and Kizih that my item will be delivered, but to no avail. What further frustrates me even worse is that I get a message and an email every day telling me that my order is on its way. I received a call from the courier company telling me that they cannot pick up my address, what is surprising about this is that both Rihanna and Kizih confirmed my address and the courier company keeps saying that my address is incorrect. What boggles my mind is if the address is incorrect, how is that the other parcel was delivered to the same address the first time? This whole experience has inconvenienced me as a Sportscence customer. Why do I have to keep on following up with these people and further have to be subjected to deal with such rude and seemingly unprofessional people from the courier company. This has been the most appalling customer service I have ever experienced as a customer