Iball tablet 6318I

I brought tablet of Iball slide 6318i from snapdeal.com on date 23-oct-2013 .This tablet get corrupted within few days .Intially i go tto service centre 2-3 times a month thery repair it but after 2-3 months i have to go service centre by 4-5 times which is very expensive as service centre is about 6-7 km from my house .They changes it speakers,wifi adapter(something for wifi) ,more than 100 times intsall android software .This tablet get corrupted withi 3-4 days or maximum 10 days . it’s ok till its warranty period buyt after warranty period i have to pay money for repairing .So i need compensation or replacement of tab .please do something.
Thanks for reading my problem