Poor service and empty promises

I ordered a personalised cake for my husband on 01/08/2017 with promise that it would be delivered to his place of work the next day for his birthday. Needless to say on 02/08/2017 the cake was forgotten @ the hub by the driver and wasn't going to be delivered. On the same day I requested a refund which they promised would be paid into my account within 7 -10 working days. None of which has surfaced. I spoke to Ntsako, Aphiwe and Shirley Njozela, who even sent me a voucher for my next purchase of R200. Which I have made clear that I won't be using because I will never make use of their services again. I am still waiting for my refund. What poor service. Im paying for their mistake. On top of that Shirley is now ignoring my emails. How do they calculate their working days since it's the 27th of August already.