PLEASE SOMEONE INTERVINE ON THIS TERRIBLE ACT

I FOUND OUT THAT THIS DMC3 IS IN MY CREDIT PROFILE AND I AM OWING THE R18000.00 FROM 2019,I AM SO WORRIED THAT HOW CAN THEY KNOW ME WHILE I DONT KNOW ANTHING ABOUT THE SO CALLED DMC3 LOANS AND ITS DENTING MY PROFILE WHICH I AM FIGHTING TO MAINTAIN.