Return policy

I ordered on the 29th of July 2024 on the Nike website and my parcel got delivered on the 6th only to find out that I took a smaller size. Then I followed the return policy as it was stated in store that I need to return via online till today it’s still pending did message them on their portal and I was told that my parcel was on the way to their how when the parcel is still with me and why can’t on exchange in store now I’m going to have to order again and pay another R250 for courier is that fair for customer poor service to the core.