Wesbank Car Insurance paid in full -over and over again I have to send proof or I will be handed over.

I have received an sms today after 3 years that I still owe Wesbank money on a car that was paid in full. How many times should one receive these sms'e if they can't do a simple thing like fixed their accounts. I am sick and tired of their threats. Get your facts straight. 3 YEARS ago. How many times should I now go back and look for the proof that the car was paid in full. REDICULOUS. Hand my over and you will have the biggest law suit ever imagined.