Worst Ever Customer service from Coricraft store manager Zandi Lerumo and staff

I have experienced the worst customer service from the Cresta Mall Store manager (Zandi Lerumo) and her female colleague. These ladies lack the discipline to deal with customer issues. I have a refund issue with their third party payment provider and asked to be assisted and the manager didn't even bother to try and understand my query and told me sort myself out, yet I made the purchase in her store, did my first payment instore I told Zandi that that is nonsense because what type of customer service is that, I am explaining that I am having an issue and as a store manager "you say I must sort it out". I also explained that the refund amount was incorrect she later called me and summoned her junior staff member to come and explain their calculation that lady started talking in circles and made unnecessary examples which I got impatient with and asked her to stick to the facts being the money debited from my account, she kept one wanting to continue with examples that did not make sense and refused to listen to my query on the refund amount and told me that she is "the most patient person" and I must stay with my nonsense and hung up on me. The item was returned in store on the 5th of October and today is the 26th of October and a staff member comes and tell me that they are patient while my money is on their side making it as though I am wrong for being unhappy with the service??. In all this encounter the manager did not even offer a solution or even apologise on the regard that I am experiencing a problem. This manager Zandi Lerumo lacks business etiquette.