The Branch Manager,
This is to inform you that I am holding a loan account in your bank as I took ______________ (mention amount) amount’s loan. The following are the details:
I write this to bring to your notice that I am facing an issue with ___________ (mention your issue – amount debited but not reflecting/ repayment issues/ any other). This is to request you to kindly look into the same and in this regard, you may contact me at ___________ (mention contact details).
Thankful as always,
____________ (Contact details)