Ipad touch is not working

My ipad pro 2nd gen screen suddenly became total unresponsive to any touch . So i cant even unlock my ipad . But buttons are working fine . I tried every meythod i even format and restored my ipad threw itunes but its not working . The screen is fine but it looses the touch . So i get to the apple service center and told them about the problem and they said that its a kind of hardware issue which they cant fix . So they cant help me they dont even openup

the ipad to look inside .. I dont know what to do . Im also out of wArranty period .