Bad experience with sales manager and challenging refund

Watch out for Turbovent, the sales manager is very dishonest an *********. I ordered a turbine for my roof which at the end was not the correct size, but besides the point. The years experience Turbovent is bragging about is questionable, because the team installing the vents, didn't have any experience working on my type of roof. It was a thatch roof, but was replaced with Harvey Tiles. The sales manager Lineth said they requested a site assessment which I don't have any knowledge of, not on the phone or not on email, as the initial order and communication was all via email. I cancelled the transaction and according to company policy I'm losing 15% of my money because it was the incorrect turbine, and they didn't do a site assessment, because if they did, I would have had the correct information for decision making and they are charging me R600 for the call out. It took Turbovent almost 3 weeks to refund my money and every day is a different excuse, or the best is, Lineth only ignores me. They made me pay the money for the turbine before they manufacture, but now they can't pay my money back. Once again, new customers, please insist on a site assessment before ordering or paying Turbovent any money. For a company working with the public, Lineth Nkomo, the sales manager, has a terrible tone with client's when caught for not telling the truth. I'll rather make other plans, than ever thinking of making use of Turbovent's services. I would just like to thank Aimee from accounts, who took responsibility and ownership of my problem, and sorted it out, not just making empty promises and hope I go away.