The best option would be for her to contact the RTDRS and ask their guidance, they handle all the landlord/tenant dispute stuff and would know they exact requirements.
Her being on a lease or just subletting will make a big difference, but can answer a couple of things for you. Required notices have to be in person or by registered mail, so she would most likely need to re-submit her notice. The damage deposit can only be withheld to cover damages and that is only if a proper inspection was done at the beginning of the tenancy, otherwise the landlord is SOL.
The landlord is also required to provide a "notice of landlord" which gives contact info, if she only has an email address, I would bet that this was never done.
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