Thanks for reaching out to the community. I am sorry to hear that you are unable to register your SoundTouch 10.
I would recommend that you reach out to your regions Bose product support team and an agent there should be able to get your product registered for you. Our team can be contacted via clicking this link and selecting your region, this will redirect you to our website. Please scroll to the bottom of the website and there you will find a 'Contact Us' tab, this will provide you with all the relevant contact information for your country.
Please let us know if you have any further questions.