PAYE record not with HMRC

I had monthly payslip from my ex-employer about the amount in PAYE and NI but all these records no shown in my gateway log in, I have sent 2 letters (one in July 2023 and one in Feb 2024) to HMRC with attached P60 and P45 as an evidence proof. HMRC has "completed" my enquiries but yet no record on PAYE nor NI. What else I could do to get HMRC to update?

Hi tivoli1229,
You would need to contact HMRC here for us to be able to confirm whether we hold these records and to advise further.
Income Tax: general enquiries
Thank you.