False & Misleading Sales Information - I WANT A REFUND!!!!!!

Hi, please assist. I ordered new replacement parts for my out of warranty laptop, for service tag 90FC1W2. Almost R7000. ONLY after payment was made from my bank account to your bank account (same bank), ONLY THEN was I told that the parts are refurbished parts and not brand new. This is misleading and under false pretence. I advised Dell to cancel the order and refund me. The customer service is the worst, the agent in question is dragging their feet and taking days to respond to me, and has now asked me to mail sensitive information like my bank details, to a supoort mailbox. Surely you know information needs to be kept secure and private according to South African legislation? Any requests from mefor finance or account department contact details are being ignored. I am not going to wait 12 business days for a refund for my money that Dell got me to pay under false and misleading practices!! Please escalate this, I want my funds back NOW!! This is disgusting client service and a complete disappointment, one expects better from your brand.