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I think this offer is related to your market and thereby, hard for me to give you information about how to proceed with it. And by the look af the link you have provided, it looks like it's an offer from Sony Electronics. I suggest that you raise Sony Electronics and/or your local support team:
Sony Electronics:
https://shop.sony.eu/shop/mimes/openAccess/legal/contact-us/contact_en_GB.html
Local support team:
http://support.sonymobile.com/global-en/contactUs/