Return policy at Tekkie Town Waterkant Street

Purchased two pair of sneakers early April and was told their return policy was 30 days cash back. I told the manager (Chantelle?) after a week that I wanted to return one of the pairs. She said she would inform me when they had cash to give me the refund. I never heard from her so went back to the store on 28th April. I was then told I couldn't get cash back since I had paid with a Mastercard Debit gift card. She then issued a voucher though I insisted getting my cash back. I contacted their support service and they agreed I should get a full refund. I spoke to Vanessa and she said the manager would contact me regarding the refund. I contacted Vanessa again on 18th May to say I have not heard a word and that I would like the refund EFT'd in to my account. Not possible apparently but the manager would definitely contact me as soon as they had cash to give me the refund. It is now 3rd June and haven't heard a word. The manager of Tekkie Town Waterkant Street is very unprofessional and does not care about customer service. It is the second time I have had issues with this store when wanting to return something. Shame on me for going back there I guess.