1. Is bank eligible to get my mobile number from third party as reference without my knowledge as I haven't provided my details to Kotak Mahindra Bank at any point.
Whether the bank got it through anyone is not a matter of concern, the call by the SI and the lawyer from some other place asking you to pay the amount within an hour is absolutely illegal, unlawful and wrongful act.
Firstly the SI has got no power to transfer the warrant issue by court to some other place from his jurisdiction, he can send it back to court stating that the accused is not residing within the police station limits under which he is deployed. further the lawyer has no power to cancel the warrant issued by court and any warrant not issued by court is not valid and just a fake document meant to cheat and threaten people.
2. Can a case be lodge against me, though I don't have anything to do with the loan.
As a matter of fact no case can be registered even against your husband at this stage because it is barred by limitation. As it is no case can be lodged against you since you are no where related to the matter.
3. If the warrant has been issued and the police comes to arrest me, how should I deal with this situation.
No warrant can be issued outstation persons by the police, the court may direct the concerned police station of your state or city in this regard but before that the accused shall be summoned and only on his refusal that the court shall proceed to issue warrant agaisnt him, so therefore there is a lot of procedures to be followed before making an arrest.
4. Can I lodge a complaint against the bank under privacy violation as I never share my number with them and for the harassment I got in the form of telephone call by the lawyer for settlement of pending amount.
You can lodge a complaint agaisnt that SI and the lawyer for making threatening calls and no case is maintainable agaisnt the bank because you cannot ascertain that the bank only has intimidated you.