African bank spam calls

I am getting spam calls from African bank to let me know about an outstanding amount of credit and loan i still have to pay since 2012. I don't have any proof about the credit card they said i took and the loan of 2012 was already being payed in full. My call identification shows them phoneing from different locations and shows spam calls. I know i don't owe them anything, they aren't allowed to track my personal information