how many GB dose BD and BG use? i am being charged for them now

it depends on how often you refresh, and how many objects do you need to load for each refresh, as well as other things that needs a connection to and/or from the database and server.

if you just login, and only refresh once every 20 mins, it will use less bandwidth than refresh vigorously and sending attacks and doing actions once every 2 mins.

well could you tell me the GBs used by refreshing per tick in a 1/tick per hour 3/tick per hour and 6/tick per hour? i want to play this game free, like always