A. 1. Review your bill: Regularly check your bill for any discrepancies. Compare it with your service agreement to ensure you are being charged correctly. 2. Keep records: Maintain records of your service agreements and any promotions or discounts you were promised. This can help you dispute any overcharges.

B. 3. Contact customer service: If you notice an overcharge, contact customer service with your documentation. Be clear about the discrepancy and provide evidence to support your claim.