Hi Dylan 5,
We are sorry to hear that you have been able to speak to an advisor on our helpline. Lines are extremely busy at present. If you are still unable to get through by telephone, you can write to HMRC at the following address:
National Insurance Contributions and Employer Office
PT Operations
HM Revenue and Customs
BX9 1AN
Alternatively, you can use our webchat option which is available 10am to 2pm Monday to Friday. Please see the following link:
National Insurance: general enquiries
Please note, HMRC can tell you if you have shortfalls on your National Insurance records that are available to pay, but we can not tell you if paying for those shortfalls will increase your pension. You need to check this with the Department of Work and Pensions.
Contact the Future Pension Centre
Thank you.