My number 08143569664 has a negative balance of -5000 worth of airtime of which i never borrowed. Please rectify

Dear MTN service provider, unknown debt occurs in my account balance which I did not borrow for airtime or data. Please kindly rectify this issue. Thanks. Number 07042063597

I didn't borrow airtime but yet it's my balance that there is a debt . Please...

Negative balance in my account with borrowing from...

Just blank