Takealot reneges on their returns policy

I bought New Balance running shoes from Takealot which were too small. I only fit same inside my house, packed it back in the box with the tag and returned it in line with the returns policy a few days later, and ordered other running shoes from them, which fit and which I kept.

Inexplicably, my return of the unused shoes was rejected. I never received a reason; no email was sent to my registered email address. Since then, takealot has been giving me the runaround and I have still not been refunded despite the shoes being available for collection (again, since Takealot simply shipped them back). They seem to be reneging on their returns policy, which is *********.