Chevrolet India — Rude Behaviour & improper Responce

Hi sir/Madam, I have purchased a Chevrolet Beat car from KUN Motors Nagole Hyderabad on 31st Dec 2014 . I have exchanged my old Maruti-800 car, at the time of exchange they said that they will charge RS/-2000 for RC transfer but when it came to car delivery they charged me RS/-4000. At the time of car permanent Registration they dint even informed me till last date and they dint even provided me any documents till the final day of registration and when i went to showroom for enquiry the response was so rude that i cant even explain in word. All car manufacturing company will provide car registration also but when it comes to Chevrolet the company is not yet all bothered about the customer once they sell the car. I have taken car loan from HDFC bank. The bank as sent me that the loan amount of RS/-4, 62, 000/- as approved but the executive said that only RS/-4, 55, 000/- as approved . After repeated enquiry about the loan the executive said that for some suraksha plan the bank as charged 6000/-, but without my permission how they will charge all those charges. It was so worst that i dint even met the bank employee once, all the thing are done in secret. At the time of Purchase only there was RS/-10, 000/- loss & i am worried about how many things i have to face to continue with this Chevrolet .I Cant even Explain how worst was this experience with KUN Showroom Nagole Hyderabad. Please try to resolve this issues . Thanks & regards, Trishool