Hello Arnoldus
Take into account that you can get only one Helium Balloon per character. No matter if you have more trade proofs with you.
If you have any other questions, don't hesitate to contact us again.
Apologies for the late response.
Seal Online Team
Hello GM,
the event is over but i still have the quest, when i drop the quest, it cannot be dropped. and now it is wasting my 1 slot inventory. please help
thank you