Credit Refund outstanding for almost a MONTH

Sadly I have to use this platform to raise my voice, Because no one at Takealot seems to be bothered by my query.

I have order Adidas running shoes (Size: Uk5) for my wife on 25/10/2019. Takealot delivered the shoe on 01/11/2019. After my wife fitted the shoe it was to big. I requested an exchange for a Size: UK4. Takealot picked up the package and replaced the shoe with a UK 4 the following week. My wife fitted the shoe and then it was to small. I contacted a shoe store to find out how this is possible. They explained that Adidas also come in half sizes. I asked Takealot if they have half sizes which they confirmed they do not have. Therefore I requested them to come and pick up the shoe and credit my account with the value of R879. After a week I phoned Takealot and ask how the process is going with my credit refund. The lady responded that on her system shows that Takealot have not yet picked up the shoe. I asked her email address so that I can send her the proof of the waybill that the shoe was picked up (***8 – InterTownTransport). She was baffled for the system showed a different scenario, but the couriers confirmed they have picked the parcel up. She confirmed that the problem is at the couriers side and will sort this out immediately. It is now 28/11/2019. Almost a month later and NO response at all. I have not even heard of any feedback or update. I have send 2 mails this week with no response from Mihle Ziqu from Takealot. This is a big problem for me, no so much on the amount that is owed to me, but about the service delivered in this matter. We buy a lot of our things through Takealot and have never gone through a business transaction like this one. I am waiting for almost a month on my credit for my account, and they just don’t seem to bother about this ‘small’amount. For me it is not about the credit alone, it is just the way the process is playing out. I cannot be held responsible for a mistake on Takealot’s side. I trust that this platform may help me to speed up the service and raise eyebrows to the lack of quality credit refund system with the applicable couriers service.