Opton Telecom ensures that you receive your invoices at least 10 days before the due date. We endeavour to charge your account accurately and without errors. If you believe that there is an error or if you have a doubt regarding any charge or charges then please contact our customer care on 0203 930 0572. You can also email to support@optontelecom.co.uk. We will investigate the issue and if the claim is legitimate we will refund the erroneous charges immediately. Please be aware that billing related complaints will be resolved within 14 business days. Refunds will appear in the next bill.