I want my money back

On the 22 of Oct I ordered a waist trainer Order #***2 and I returned the product wo Alberton branch because I need the size to be changed. Fast forward my order was return and I got an email to confirm that I can pick up the replaced item at Midrand. The size was still not changed and i noticed this online, I then told Takealot to return the item. I never received any item ever since my return. The courier service tells the consultants dealing with my enquiry that I got the item, my question was when? and why will I go at the extend of making so many follow ups. I will like Takealot to investigate my matter and credit my account with the amount I purchased for which I never got. The courier has ****** my return and claim that I received it. During all of this no one is calling to seek clarity, talk about pathetic customer services. I've send over 10 emails to take a lot with zero help!!!