Santander Bank US Bank Account Or Service Complaint

Santander Bank US Bank account or service department,

Other bank product/service Account opening, closing, or management Maryland

l relocated to another state, found out my bank did not have any branch in the area. l called my bank to close the account, they told me l need to come to the branch to close the account which l did. the cashier closed my account, gave me my money, he told me this is the money l have. he did not explain to me he gave me # - dollars from the line of credit to borrow of which l could have not accepted that. he gave me a wrong information saying this is all my money l have in the bank. now the bank is teling me i need to pay the money with interest. if l have borrowed the money, l should have talk to them on how to pay the money back. since l was informed wrongly, which was not my fault, l should not be charged for the interest.