Iberry — Poor product quality

Address:

Chennai, Tamil Nadu

I have purchased "iberry tablet pc" on july2012. within two months lot of problem faed like
1.battery backup is very worst
2.While connecting internet via Bluetooth, TABLET is automatically restarting many times.
3.If i touch with one finger it will sense multiple touch while charging.
4.Network selection is not supported for all networks.
5.Sometimes automatically Music Player is playing when audio jack is inserted
6.If i check the balance in my TAB. for example, for air tel *123# for balance - it shows some other codes.
7.Some of the sound i observed while charging.
8.Tablet hangs and restart many times while using.

I have given to service at iberry support for 3 times, but problems are not solved