Hi @Yanchi
If your tickets sold (which it sounds like you did) but you had listed them for the wrong venue and thus are not able to provide the tickets to the buyer you will be hit with a penalty - usually 100% of the value of the sale. If your tickets have not sold then delete your listing and relist for the correct venue.
Hi @Yanchi
Stubhub does not allow allow sellers to reach out to buyers. You can try calling Stubhub at 866-788-2482 and explain what happened but I suspect they will say since you can not deliver the tickets you will pay a penalty even though it is a mistake in listing the tickets.