MTN DEDUCTED MONEY OUT OF MY ACCOUNT WITH OUT PERMISSION AND THAT BAD

Very bad experience You know what very rude when you ask someone something and thy didn't respond MTN very bad i write a review but no respond. My question was why MTN came after 5 years and all of a sudden, thy came and deducted money out of my husband account without permission. His contract end 5years ago. All i know every contract is only for 2 years.