What is the hsn code for gift card or gift vouchers?

I am purchasing gift card or gift voucher from showroom like lifestyle or Fab India. They are not mentioning anything on GST in the bill. They are not charging any GST. I have to do a resale to my client. How can I make an invoice? What is the HSN code for this. I hope I also make a nil rated invoice? Please someone help me on this?