Timescales for crediting Class 2

My state pension decreased without warning in December 23. Enquiries identified 14 contributions missing from 1 year and 2 from another. I still had 48 years contributions. I was sent a reference number for one of the outstanding years and paid the 2 outstanding on 15 Jan 24. They were credited almost immediately but my State Pension has not recovered. I paid the 14 NICs outstanding on 7 Feb but these have not yet appeared in my record. How long will this take and will my pension be fully reinstated? Will I receive back payment for the months I have been without the full amount? Thanks!

Hi Joanie Mansfield,
 Unfortunately, without checking your personal records, I am unable to confirm if the payment you made on 07/02/2024 has been received, or provide you with a timescale for the allocation of payments.
Please contact the National Insurance contributions helpline on 0300 200 3500. Lines are open from 8am to 6pm, Monday to Friday.
With regards to your state pension calculation, you will need to contact the Department for Work and Pension for them to check if the extra payments you have made, have increased your pension. Their contact number is 0800 731 0469. Lines are open from 8am to 6pm, Monday to Friday.
Thank you.