Hi,
We are unable to give a decision about your enquiry on this forum.
The criteria to pay voluntary NICs while abroad is UK legislation and is covered under article 147 of the Social Security (Contributions) Regulations 2001. We have to adhere to these rules which are stated in UK law.
Although we do look at an individuals record as a whole we must look at the period immediately prior to leaving the UK.
You may wish to appeal the decision made, you must write to HMRC and request an appeal to the decision made for your case.
There are 3 stages in the appeals process:
You must provide your name, address, DOB and NI number in your letter of appeal.
You must provide a full explanation of the appeal to be made.
Provide any evidence that may support your right to an appeal.
More information can be found on here:
Guidance on Social Security abroad: NI38
Thanks