Burnt Stainless Steel Saucepan

I burnt my best saucepan. I filled it with water and detergent and left for 24 hours. It mostly came off, then I used a stainless steel soap pad which helped, but there are still block spots and discolouration on the bottom of the pan. Can I use the half vinegar and half water mixture to bring it back? And what can I use on the base of the pan as it is discoloured?

By Edwina B