Good Morning Minoush, Its sad that this should happen, but Abushafeeq is right.

But If you got the lady from the agency, ie if they have arranged for her to be recruited at your place, then the agency should be arranging for the ticket, . Moreover, most agencies have a 3 month policy wherein, they will provide you with a replacement, should you be unhappy with the maid, or for such situations.
Please speak to them and check your contract as well.