If you wish to cancel the contract you would either need to provide 30 days notice to cancel without the number.
Go to your O2 account and select 'Membership and Subscriptions' Scroll down to 'Cancel Subscription'
Contact the business and say you want to cancel the contract because you're still in the cooling-off period. You'll probably need to give them details such as your account reference number - check any documents or emails you have from the company.
You can cancel a Direct Debit at any time by simply contacting your Bank or Building Society. Written confirmation may be required. Please also notify us.
Contract Cancellation In case the delivery period is not expired, the contract cancellation will require seller consent. The seller will have option to accept or reject the cancellation request within 5 calendar days. In case, the delivery period is expired, the seller consent is not required.
Contact the business and say you want to cancel the contract because you're still in the cooling-off period. You'll probably need to give them details such as your account reference number - check any documents or emails you have from the company.
O2 end of contract tariff options If you happen to be out of contract with O2 already, it will send you an annual reminder that you're still paying for an old tariff. In these notifications, O2 will offer you a selection of new plans that you could move onto once your fixed-term is finished.
It's true that 30 days notice is needed when cancelling the contract, even if the contract has ended. This is only applicable to a standard cancellation through, and if you're planning on using a PAC or a STAC, the account will only be billed up until the point the new network completes processing of the PAC/STAC.
Almost all providers require 30 days' notice if you wish to leave.