The same happen to me till my son was 3 years old. (I am a working mother too and have to work oversea). Nothing you can do in this moment unless you quit your job.
Spend time with him/her as many as possible. Bring him/her out but without your maid-so the BB won't have choice.
Kids will know who is who from day to day. And they definately know who can give them" Jet So".