You have to be more persistant than that this is what I got last night its the 4th email and now the case is rolling but contact everyone and Coinbase knew about this and still processed transactions after the fact:

 Your  report to Hong Kong Police on 2013-12-04 via internet was referred
    to Kwun Tong Police District for enquiry under police reference LM (319)
    in KE KT 73/14 Pt. 29 (319/13)FC.

    It  is  learnt  from  your email that you had been deceived. In order to
    facilitate  our  investigation, I would be grateful if you would furnish
    us the following detail :

    (a)      Sequence of event including details of the purchase order which
    include date/time, goods and the full address of the website you made
    the purchase order
    (b)      content of the correspondence between you and Phoenix
    Technologies
    (c)      your business relationship with Phoenix Technologies before
    this incident
    (d)      any proof of payment
    (e)      total loss suffered

    Please  reply  as  soon  as possible so that Hong Kong Police could take
    follow up action promptly.

    Best Regards,

    Woman Detective Sergeant CHAN Mei Yuk
    District Intelligence Squad
    Kwun Tong Police District
    Hong Kong Police