This carried on until November 16 2017, when she visited Dr Dillon against his wishes, the court heard.
During that meeting she “conducted a course of conduct” that distressed him, it is alleged.
Christol, who studied her BA from 2011 to 2016, appeared in court on Friday charged with harassment without violence.
She pleaded not guilty to the charge. A trial date was fixed for April 6 at Hendon Magistrates’ Court. Christol, of Upper Holloway, north London, was granted conditional bail.
The offence carries a potential maximum six-month jail term or an unlimited fine.