Dell India — My 10000 rs drowned in buying a dell tablet.

I bought Dell venue tablet and after 1 month it is continuously hanging and thrice I have taken it to get serviced. Various times I have lost data and it's only seven months. Getting crashed up is a ritual for it and after warranty I cannot afford to get motherboard replaced so often.My complete money has been wasted.For extending warranty they are asking money. Firstly they send such bad products and want money for services.