Interview - new clothes needed

[ineedteanownotlater]

I need a wow outfit for an interview that I have been shortlisted for. It is my ideal job and a considerable pay rise!
I am a size 16-18 6ft tall and curvy.
No idea what to get, need the whole outfit including shoes. Shoes can't be flat as I have bad feet so small very comfortable heel

Help!

You'll need to give clues on industry. Is it creative, corporate, public sector, etc?

Education - but not a teacher

I'd go separates you can use in different contexts either. I bought this skirt last week - it's beautiful and would be perfect with a tucked in blouse, but then could be dressed up or down afterwards.

I saw that very same Mango skirt in the shop last week and almost bought it. It's absolutely lovely.

Maxi skirts don't work for me Big bum and tum means they hang weird!