ghd Curly Ever After - Curl Hold Spray (120ml)

Arrived without a lid. How do I contact seller please?

Is it a genuine ghd product? it came without a box, just the spray with its lid

I have super straight and fine hair. I used bendy curler which you put in your hair when you just wash it. Would this product hold the curls?

Does this only work with heat, or could you use it with rollers/curlers overnight?