Fraudulent Transactions In My Stanbicibtc Account

I have a Stanbicibtc account that I have not used for over five years now, I was thinking by now it would have been blocked or turned dormant because it is an account I don't use anymore.I was so surprised today when at 4:26 PM, I saw a credit alert of thirty thousand, three hundred and forty-two naira, ninety -six Kobo (N 30,342.96) and the description was showing loan repayment till 28th April.At 6:25 PM still today, I got a debit alert of nineteen thousand, five hundred and two naira, thirty -seven Kobo (N 19,502.37) from the same account with a description showing loan principal + interest pmt:00560.And right now, there is a balance of ten thousand, seven hundred and ninety-naira, fifty-nine Kobo (N 10,790.59) in the account.I know nothing about this transaction. I did not request for any loan. I did not make any withdrawal from the account. I have not used this account for over five years.When I dialed *909# to check my account number, I saw another account number alongside the account number I was given when I opened the account many years ago. I have lodged a complaint to the bank though but does anyone have an idea on what is happening in the account?