The agency's owner, Madame Lark, believes in fate. If Saki wins the man at her address, Madame Lark tears up the contract and pays for the wedding.
If Saki leaves, she owes the flight, the visa and the fees. She thinks the worst case is going home broke.
If she can't pay, the agency "re-places" her with a client of its choosing, overseas. That contract has no way out.
She doesn't know any of this. She'll find out if she calls them. Your door is the only one she has.