Bank account frozen reason unauthorised amount credited

I am writing to complain that an unauthorised amount was credited to my bank account through what appears to be an unauthorised link, without my knowledge or consent. I did not request or approve this transaction. As a result of this unauthorised credit, my bank account has been frozen. I have not been able to access or use my own funds since then because of this action taken by the bank. I request that my bank account be unblocked at the earliest, since the unauthorised credit was not done by me and I should not be penalised for it. I request the concerned authority to look into this matter and resolve it as soon as possible.