Citi Bank - Account got blocked

I have a Citi Bank salary account. My account is blocked for an online transaction done in a shop long back. Citi bank needs Shopkeeper's personal information. Shopkeeper denied me and also Citi Bank executive. He states why would I provide my details to Citi Bank when I don't have any relationship.
No shopkeeper would provide his personal information. Citi Bank is trying to preach somebody's personal information from there customers. Even after * week, the status is still blocked. Citi Bank manager denies to provide any information regarding my account blocked status and for what reason. The shopkeeper says he would file a complaint against me for asking his personal information.
Police are not allowed to involve in this is what Citi Bank manager responded to a police officer when we walked into the branch. Citi Bank is implementing hidden rules and looting customer. I have undergone lots of problems. All my money is in only one account. Unable to transfer, close and even order food. It's my hard earned money.
I lost an agreement as I did not pay a security deposit. I lost EMI and Cibil score for not paying. I was not able to pay house maintenance and its a shame for me everywhere. I am struggling hard for my bread and life.
They don't need my information but why would some shopkeeper give his information?
Citi bank has brought me to roads today. My loss of life, Citi Bank is responsible for sure. Citi Bank is responsible for my life and death.