Yes. Agreed.
扮聽唔到.
I presume that she will not ask again.
You can calculate how much she has consumed daily(e.g. every meals).
then show her the contract which stating that her employer will ONLY need to provide her reasonable food (e.g. 3 meals per day + water). The decision to pay her Hk$300 month or providing daily meals is up to her boss, not her.
Remember -> water (NOT any other beverage, e.g. juice, lemon tea NOR coffee). If she wants to have drink other than water, she has to buy for herself.
Re-instate to her : she has no right to make such decision. ONLY the boss.
If she does not agree, ask her to get a fair written comment from immigration department.