Ben Scrivener

Hello, I am hoping for help to solve a problem. I recently submitted a form (Modelo 030) to show my non-tax resident status in Spain. I contacted HMRC a month ago, in which they provided me with a Letter of Confirmation of Residence. However, the Agencia Tributaria are asking for a Certificate of Fiscal Residence from the UK. However, as I have no source of income in Spain I believe I am unable to attain this and was only provided with the confirmation of residency. The Spanish authorities will not remove my name from their system. How can I go about solving this issue? Is anyone from HMRC able to assist me with this. Thank you.