Terrible refund experience

Awful refund experience/policy.

* I ordered R1000 worth of goods. * Used R250 voucher. Credit card for balance. *Returned some ill-fitting clothes, and kept some. * Kept R400 worth of goods. * But instead of using the R250 voucher and paying the balance by cc, they've charged the full amount to my credit card. And refunded the voucher!?!

So I still have a stupid R250 voucher.

They refuse to rectify. Nothing in T&Cs to support this practice. Actually, the opposite.

An unfortunate experience that will prevent me continuing to support them.