DEFECTIVE WORKMASHIP AND EXTREMELY POOR CUSTOMER SERVICE!!!

I initially purchased a Delinia Kitchen Sink Mixer Tap Thomas Spring Neck Black H46Cm Spout Reach 27Cm. I was happy with the product however the handle broke after about 6 months and had to return the tap. I was advised by Sharconia Seapose that they did not have stock of the same tap and they would only have stock after two months. I could not go without a tap for two months. He then advised that I should purchase another tap that was in stock. Mind you this tap was more expensive than the one I initially bought however I need a tap in my kitchen. I asked if they could invoice me for the shortfall as I did not want to have issue with the refund. He advised that he can’t and nor can management. So, I purchased the new tap as advised and he agreed that my delivery fees for the initial tap would be refunded. This happened in July, it is now November and I have been asking for the proof of refund into my bank account and to date no response. The new tap that I purchased is defective as the spring new does not attach properly, however i am too afraid to return this tap as I know that they will not return my money because I am still waiting for my previous return money. Can someone for Leroy and Merlin, kindly contact me and advise the way forward as I am not happy with the fact that I am still awaiting proof of payment for my initial return and the fact that the second tap is not working, and I paid R2600.00 plus deliver for something that does not work.