contact your bank, get bank account details. do telegraphic (TT) transfer.
But it will cost at least 7,000.00 or more on each transfer as a transfer fee.
the above amount will be charged by your Ausi bank, not Sri Lankan bank.
or else do 2 or 3 rentals together always in advance. so you can save some transfer costs.
else do an arrangement of settling loan by your relation or friend and settle his debt.