A. 1. Review your bill: Carefully check your bill for any discrepancies. Compare it with your previous bills and your service agreement. 2. Gather evidence: Collect any relevant documents, such as previous bills, contracts, or promotional offers that support your claim. 3. Contact customer service: Call customer service with your findings and provide them with the evidence. Be clear about the specific charges you believe are incorrect.

B. 4. Set up online account management: If you haven't already, create an online account with TalkTalk. This can help you monitor your billing history and make it easier to spot errors.