JPMorgan Chase Bank Account Or Service Complaint

JPMorgan Chase Bank account or service department,

Checking account Account opening, closing, or management New York

On approximately - - I opened a checking account at Chase bank. On - - somebody made - unauthorized purchases with my debit card for $90.00. On - - Chase informed me that my account was on restriction pending closure. They said that they will not provide me a reason. This is very unfair because I have not done anything wrong. I went to different branches 4 times and I called up 5 times but they refuse to give me an explanation. I want an explanation why they are closing my account.