Suzuki India — Suzuki gixxer sf

Address:

560071

I purchased my suzuki gixxer on 13 Feb, 2016 and on 23rd July, 2016 my bike got stolen. I purchased the bike for around 1lakh, 5 thousand but these people insured me for just 64thousand . I think that the suzuki dealers have cheated me. I am very unpleased with the insurance.
The company dealers have cheated by making the insurance of very less value. Please suggest me something to get the remaining money back.