HELP, Amazfit K.O. Pantalla Bloqueada tras SW Update

Hola Foro Amazfit,
os escribo para informaros de lo que me ha pasado con un Amazfit que he comprado por Gearbest, version China. Es el segundo que compro para regalarselo a mi hermano, con el mio estoy muy contento.
La semana pasada me llego de Gearbest, lo puse a cargar, lo conecte con el Xiaomi Mi5 de mi hermano, y cuando se conecto al wifi se actualizó a la versión 1.2.10
Tras reiniciarse después de la actualización el reloj parece funcionar normal, pero si bloqueas la pantalla apretando al boton o simplemente dejas que pase el intervalo de tiempo hasta que se autobloque la pantalla, es imposible desbloquearlo, el reloj no hace nada, se queda congelado. La única forma es resetearlo apretando el boton de power un rato, pero al reiniciarse el problema vuelve a ocurrir.

He contactado con Gearbest para que me den solución, les he enviado videos (los links de abajo) demostrando el problema, la única compensación que me ofrecen son 20USD de reembolso.
Que me aconsejais al respecto, hay soporte técnico en Europa?

Videos
https://we.tl/TyfWnkF6O9
https://we.tl/5tqkATejJo

Dear Joan，

We would like to extend our apologies for this inconvenience.
Kindly refer to our warranty policy here:http://www.gearbest.com/about/warranty-and-return.html and terms and conditions from
http://www.gearbest.com/about/terms-and-conditions.html

After reviewing your case, please review our possible solutions:

1)Keep the Item and accept refund on GB Wallet (store credit)
In this case, you can keep the item and do not need to return it to us for this time.
We can offer 20 USD on your GB wallet and exceptionally reward you with extra points (e.g. If your refund is 1USD = 2 points ,3USD=3*2 points => get 6 points etc)
The refund will take 24 hours to process and appear in your GB wallet.
You can use both your wallet and points to purchase your future products.
Learn more about wallet benefits: http://www.gearbest.com/about/gb-wallet.html
Check out how to use point :http://www.gearbest.com/about/about-points.html?157wrew

2)Refund to your payment account
We can refund 20 USD to your original payment account.
Please note:
– For PayPal account refund may take 48 hours to process and appear in your paypal account.
– For credit card refund may take up to 7-14 business days to process and appear in your card.
The exact length of time is dependent on your card issuing bank.

Can you please let me know your decision?
I look forward to hearing from you.
Thank you for your understanding.

Best Regards
Jerica
Gearbest Customer Service
http://www.gearbest.com/