worst service no commitments

I am having the problem with the handset from the day one I have purchased the mobile

I have given this to repair to Micromax care 3 times till date that means the mobile I purchased was a faulty handset for which I have paid full Price
And now you want me to use the repaired which I will get after one mth

This is was not expected I feel cheated in this case and request you to replace the handset

they are forcing me to use the defective handset  keep on repairing it till 1 yr warranty and then trow it

This is not fair find a proper  solution so I dont feel cheated

and even after 40 days the phone is not repaired and I am getting any commitment from the company for repair date

faced worst shervice ever