poor code quality, and rubbish customer support ...
the purchase code, email ID, and username, but after clicking“Register Theme,” it showed an error: “The Purchase Code Is Already Being used.
Author response
You tried to import on multiple domains and when notified you posted this.
For same domain there is no problem at all.
But yes unlimited usage and unlimited import on unlimited domains is not allowed as per themeforest's standard license policy.
https://prnt.sc/xcjTkH1s054F
https://prnt.sc/jTknHax1n27N
https://prnt.sc/zXG7MTD7Zoks