Micromax — not return my tab on time and make me fool

Address:

New Delhi, Delhi, 110059

Sir i have submitted a tab p701 at uttam nagar service centre. She (Juhi khan) told me that it will take 3-7 days. But till date i did not get my handset.
One of the engineer told me sir give me two days otherwise i will return your handset again i have not found. After that mr. Dibanshu (Manager) told again sir give me two more days and i will give you handset. Now total 1.5 month completed and i have not get my tab. I also paid the amount.
I also called at customer support from there i also did not get any good answer.
Pls take action against this complain.
Micromax service centre
Uttam nagar