Best answer by Max
Could you please try the following troubleshooting steps:
Open HiCare > Smart Diagnosis > Select the Manual Tab > Touchscreen > Perform the Test Diagnosis.
If the diagnosis fails, I would recommend having the device inspected by one of our engineers at the service center for a more hands-on approach.
For the UK region you can arrange the service booking via mail chat or hotline (at 08000886700 free of charge of course) via https://consumer.huawei.com/uk/support/
To ensure a speedy process please bare in mind that the operator would need your private details such as Name; Model type; S/N; any documents related to the device, etc - please do mention that you have done the troubleshooting steps as mentioned on the forum and they will proceed to facilitate the service process.
Hope you found this helpful.