Outstanding money's

Purchase built in cupboards online for the first time on the 5th October 2020 for R17080. Did not received my first time discount was told they would reverse the sales and I put the next day a new one through got my discount and paid again R14572. I paid for installers aswell 4Sure installers who do installing for builders to have them also wanting to charge extra for cutting 6 of the sides of the cupboards and that would take 3 more days. We requested that the installers moneys to be refunded we would do it our selves. After 15 days and hours on the phone and emails they have now paid the R17080.00 but not the R3242 of installers.Builders are pathetic