Bad customer service

We bought a wedding ring for my fiance? with the off to 40% diamond sale. When we got home we saw that we did not get the discount of R1000. We went back the next day, and the employee including the manager did not even say that they are sorry, or sorry for the mistake or inconvenience caused. They made as if its our fault that they overcharged us with R1000, to top everything off, I've send in my engagement ring to get a quote for wedding bands from the jeweller. I've explained exactly how I want the bands. The next day when we went back to get our R1000 discount, I spoke to the Manager again, and showed her a picture of how I want the wedding bands, she just nodded her head. 3 days later I get a phone call, \the jeweller wants to know