Citibank Credit Card — Withdrawal from my credit card

Citibank aggresively pursued me to take a Birla Sun Life Insurance policy, which will be linked to my credit card for monthly payments. Citibank made the payment for the first year. From second year onwards they kept deducting the monthly payments but did not pay into my insurance policy account. On checking my insurance policy account online, I came to know that the payments had not been made and my policy was in a grace period before lapsing.
I made the payment finally to Birla Sun Life after running from Citibank to Birla Sun Life for redressal. Even after informing and lodging a complaint to Citibank's call center for revocation of the earlier standing instruction they kept on deducting the monthly payments and also charging late payment fees for the same.
For three months I have been regularly calling them up but to no avail. They have withdrawn about Rs 20000 from my credit card, charged me late payment fees on the same and my policy seems to have relapsed (which means I will not be able to recover a substantial amount that I have already paid to the insurance company).
The harassment caused is more pain than the money lost. I wish to at least recover the unauthorized withdrawal alongwith the arbitrary charges they have levied on that withdrawal. Also, if the insurance company refuses to re-invoke my policy, then Citibank is the culprit.