No refund for my return

Made an online purchase on the 21st of January and it was delivered on the 24th of January. Upon arrival one of the items was the incorrect size so I logged a return via the app. On the 31st of Jan I realized that no one had come to collect so I called the call centre and they advised they would log the return as it didn't get processed properly on their side. I then received an email on the 3rd of February (Zando: Return RET-DWH-***). On the 4th of February the courier collected the item. On the 11th of February I decided to follow up on the status of my refund and the call centre rep told me the item had not reached their cape town warehouse. I then called the courier lady on her cellphone because she delivers for Zando in our area and she advised she was at the depo and handed the phone to a supervisor who said the truck carrying my package reached cape town on the 5th of February. I called Zando back to let them know and I was told they would process my refund as soon as they have allocated my package. It's over a week and I have no refund and when I check my account it says return pending.