Such revolting customer service!

I went to Gelmar @ the Wembley Shopping centre on the 04th of August 2020 at around 16H00 and was assisted by a a polite gentleman.. I was shopping for a kitchen sink, tap and a few kitchen items and was engrossed by the Franke Fragranite sink. I was told that, since it's not a Gelmar product it will take about 2 weeks. I called to do a follow up only to be told that I will get the sink mid September because I didn't pay yet I paid. The staff is so inefficient and know nothing about customer service. I was then offered a discount, which I don't need! The Last resort they are giving me is a sink that's on display, how pathetic is that!