Clueless Customer Service

Hi. I am really dissapointed with the (lack of) service I received regarding my query. My order (***4) was placed and paid on 29 August. Since then my delivery date moved from 9 September to 11 September to 13 September due to the MP seller not being able to deliver the phone cover to your DC in time. I then requested that this item be cancelled as I would need the bag before 14 September. After request ing this twice it was finallly done. Sizakele initially confirmed that the bag was in stock and that the warehouse will be notified to pick, pack and ship and that I will receive a new shipping date via email. I received the email confirming my cancelled line and credit, but nothing about the delivery date. I logged into my account to check the shipping date and it has moved to 16 September. So, again, I contact Sizakele about it, I was then told that they have to check with the supplier if they have stock, this was strange as Sizakele confirmed that the bag was "on hold and available". Sizakele promised me feedback yesterday and it came as no surprise that I did not receive anything. I also received a mail to rate the service and when I selected the "Bad, I am not satisfied" I received a notification that I cannot rate the ticket as it has been closed...really?! Last night I was browsing the app again and found that the phone cover is actually in stock now, so I order for collection. Can someone just please tell me what is going on?! I am in the retail sector and can assure you I will never treat my customers this badly.