Tell them to bite you.
always a good idea if you want to have a default judgement issued against you.
I would definitely write back asking for something that can be viewed for accuracy. i’d mention that you will immediately remove any items found to be in violation, but that you see their 14 day time window unreasonable, given that their images lack to the detail you need to ID the pages to verify their claim.
I’ve not got one from them, but once register a series of car domains. MyNewPorsche caught the eye of Porsche’s lawyers, they demanded acknowledgement within 30 days, that i agreed to let the registration drop and/or transfer it to them.