How do I get rid of toxic helper?

Hi, I recently hired a maid, 44 yrs, previously worked 11 yrs in Taiwan caring for cancer elderly and 1 yr in SG. Based on her cv, she is perfect as she looked experienced. However, she cannot cook basic things, cannot understand English well and most of all, lack of basic common sense. Recently, she is spreading rumours that I gave her 1 meal a day and no money for her own good while I keep asking if she needs money or other stuffs. She keeps saying previous sg employer abused her. Now, she cried to everyone she met and yelling her soft stories. At first I believed her. But after knowing her character, I contacted back to agency. She pleaded not to tell her bad things to agency. It made me wonder if she did the same things to previous employer.. I'm currently 8 mth pregnant and I need help with housework but she is too incapable and she does what she wants. I gave her wifi password, nap times as she finished work at 9am and nothing to do till 6pm. No need to cook as she can't cook. I worry to let her take care of my baby but she cried to my mother in law and husband so they scolded me. But I am the one live with her for 24/7 and I know her character. How do I get rid of her??#pleasehelp