Karbonn Mobiles — So late in a part replacement..!!!!

Hi, I had bought a Karbonn A5 Starlast month, After 15 days of proper working the Touch had developed some problems ( menu opens/closes automatically, Keypad open up suddenly and automatically..etc etc). ook it to a Service Center of Karbonn in Delhi and they said that the Touchscreen has some problem and needs replacement. So as the set being new and in warranty period I submitted the set for the part replacement.. But it has been 16 days from now.. the replacement of the part is still not possible and the set is also not with me... We can understand that it may be a fault of the touchscreen because electronic elements can any time go rouge.. But what about the bad service rather so late service of Karbonn.. 16 days still no progress..!!! My Job sheet no is KJASPDL096913K888