have i been tricked

I can’t activate the license,
“Item License Code:” is missing

"Length should be 36 characters including ‘-’
I’m getting an “invalid code format” warning

If this purchase is from the main marketpalces then you find the p/code using this info https://help.market.envato.com/hc/en-us/articles/202822600-Where-Is-My-Purchase-Code-

If the item is from Envato Elements, then items there do not come with purchase codes and they are not required to use items.