Emergency tax on my SIPP pension payment

Hello I am an Irish citizen and paid all my tax there all my life. I am now retired living in Thailand and my private pension fund is in a international SIPP managed by a UK firm of trustees. I got my first yearly draw down Feb 1 2024 and nearly 50% was taken in tax. I filled out a tax rebate form two weeks later and sent it by regesterd post and it was received by HMRC eight days later. I have heard nothing since I phone the helpline last night the operator told me the NI number was a temporary number and he could not trace me using it. I am married with a school going child I also have visa commitments having a large sum in my bank account for 4 months before application . Holding back this monies has put a considerable strain on our finances as we have no other income. Is there anything I can do to resolve this issue the operator last night told me to wait a month till the end of May which would mean waiting five months. Thanks for reading hopefully you can help.

Hi

As you are not UK resident you will need to ensure you have completed the correct application - Claim a tax refund if you've stopped work and flexibly accessed all of your pension (P50Z).
If you have, you can telephone +44 13 5535 9022 to chase this up. if not, you will need to submit the correct claim form.

Thank you