Legal Question in Business Law in Michigan

You need to check the terms of your contract. Most contracts require a cancellation to be in writing. Even if the contract doesn't specify, you should always place communications in writing for your own protection. If you feel they are excessively charging you or violating the Michigan Consumer Protection Act, you should consult a lawyer to discuss your legal remedies. You may also try writing a demand letter stating that you cancelled via phone on X date, pursuant to your legal rights, and, therefore, you want a refund of the monies that were wrongfully charged to you, or you will contact the Better Business Bureau and Attorney General's office for their wrongful actions. Whether they were legally right or wrong depends on the contract. It's worth a shot. Good luck.