Bank Of Baroda — Wrongly interest charged

Address: South 24 Parganas, West Bengal, +91

I srikanta das loan a/c no- [protected] has aalready pay my due amount which overdue for the month of january. but my home branch said my a/c already npa. due to system problem my principal amount did not deduct as per schedule. interest amount highly charged. i did not understand why is my due amount approx 8000 rather than 5000. please help me.