OPTRA MAGNUM 2.0 LS TDCI (DIESEL). Review on Chevrolet Optra Magnum

I have purchased an optra on 20/09/07 from UDIT Motors , Thane OPTRA MAGNUM LS 2.0 TCDI

The vehicle is running fine without any problems

I have not received satisfactory feedback from dealer so can some one advise me the below

1) Is there a Extended Warranty on the vehicle or has it to be purchased

2) I understand there is a Service commitment of a certain amount of money that will be spent in three years , please advise me what is the same

3) where can I get the customization of my seats done in PU leather

Any Other Things that is helpful and important in the running and maintenance of the vehicle

So Far I am satisfied with the feel and performance of the vehilce , I feel the cooling cud have been better and GM could have provided mud flaps / floor mats since the vehicle is already priced  quite high.

Please advise as a GM customer what Am I Entiled to Receive when purchasing an optra , I have not received anything have I been shortchanged , is there something such as a welcome kit etc .