HTC — User data not saved during mobile repair

Address:

Bangalore, Karnataka

I had given my mobile phone to HTC service center to repair its broken LCD display. They have a standard procedure to format phone as a new factory model. I had requested them to not conduct this process and save the data. But they didn't give any attention to my request.
I requested them at least put a note for the technical worker to be aware of this special request. But no luck.
I want to highlight that, in today's world mobile data is very important to every user. Repair person should pay attention to special request, if any. They can't just ignore the sensitivity of the matter.