This response via the BBS is not very helpful since I have already contacted the listed agent in the UK.
The Blackview agent in the UK is not responsible for repair since the device was not purchased from them. They supplied an information sheet about a European service centre in Poland from Blackview, stamped in Chinese and dated on 2018.05.07. The telephone number provided in Poland does not work. The named firm, BMM Logistics in Slubice, is apparently a logistics firm, not a telecommunications or mobile device firm.
No listed means of contact on the Blackview website works. There has been no reply to an email to the listed address,
sophia@blackview.hk, the contact and feedback forms do not work, and the skype addresses do not appear to work. Blackview's response via Twitter has simply referred me to this BBS.
The company I bought this through on Amazon UK does not have any means of contact with Blackview. They simply recommend having it repaired locally. Since this is an armoured unit, a general mobile repair centre is unable to do this. In addition, the Blackview website is clear that any repair by a non-Blackview agent voids the warranty.
I bought the device on the basis of good reviews and the availability of a 12 month warranty. However, if I am unable to contact anyone in Blackview, then the warranty is irrelevant. That is NOT a good advert for Blackview's customer service or reputation.
I await your response with more tangible direct means of contact.