Unhappy [Q] Xperia Mini Pro Digitizer Calibration

I have broken my Mini Pro digitizer. The touch still worked but it was badly cracked. So I ordered a replacement from Aliexpress (link) and sent my phone to a local repair shop for digitizer replacement.
They sent back the phone to me today, unfortunately the bottom part of the screen doesn't recognize any touches.

They said that it has to be "recalibrated" but they don't know how.
I personally don't think capacitive touchscreens can be calibrated. I have tried flashing stock GB and ICS ftf, nothing has worked.
I think the digitizer is defective. Am I right and should I open a dispute to get my money back, or is there really any way to "recalibrate" the screen?
SE Xperia Mini Pro (SK17i)[Dead]| HTC Sensation XE