No testing after repairs

Booked iPad Air in for front glass replacement (minor damage) on 1 July and received back 2 July. Noticed top left and bottom right of screen touch intermittently not working. Putting device to sleep and turning back on resolves the issue for a few minutes. This problem was not present before damage, nor while glass was damaged. Damaged area did not even go as far as the LCD, only the black trim.<br> <br> Returned the device on the 3rd. There was no attempt in re-booking the device in for testing, as I could not recreate the issue while in store (screen had been in sleep mode for a while). It was taken to the technician, who looked at it for a minute, then sent the reception lady back with a message that he cannot see the problem, and it might be the LCD and no stock available. Device was given back to me and told to try again in a few days.<br> <br> Why bother driving back and forth if there is not a slight chance that the device might be booked in for testing? Why do I now need to pay for a LCD that was in working condition before it was sent for repairs? <br> <br> Would never recommend having devices repaired at iFix.