I started selling around February and already had 8 orders. When bank transfer
payment will be possible in my store?
It’s not automatic, you need to ask for it: https://www.bricklink.com/help.asp?helpID=18
“Offsite payment methods (including IBAN) are available only by special permission
by contacting the Help Desk. Normally a minimum of 10 positive selling reviews
(feedback) and 3 months of selling experience are required to enable offsite
payments. Exceptions may be made in countries which do not accept PayPal or other
common onsite methods.”
The second site allows to follow your tickets (even if opened the other way).
(Note that the tickets are shown as “closed” as soon as they get an answer.
That doesn’t mean they are closed / dismissed / rejected / …. It’s just how
the UI works.)