SMP EPS as a charge not a deduction?

I have taken over a payroll in month 12 of 23/24 tax year, everything has been processed as i can see correctly, the P32 matches my reports including the SMP amount. When i go onto the HMRC Portal is showing 8k+ in statutory maternity EPS as a charge. I have no idea what this 8k figure is for and why it is a charge? There should be around £700 for that month as a deduction. This shows on P32 and the EPS sent to HMRC. Never seen this before and impossible to try and speak to anyone at HMRC,

Hi ,
 

Unfortunately without looking at your account we wouldnt be able to advise. It may be that you have claims advanced funding but the EPS hasnt been received correctly  resulting in the advanced funding credit becoming a charge if it isnt used by the end of the pay period. I understand you are having difficulties speaking to us. You could contact us via webchat on https://www.gov.uk/government/organisations/hm-revenue-customs/contact/employer-enquiries and selecting ask HMRC online  .  Thank you .

Hi, There is no and has been no advance funding. There is no one available on the chat when i have tried previously.

Hi,
You would need to check the year to date figure for SMP has beed submitted on month 12 EPS, if month 12 has beed subitted with that months claim then you will need to resubmit as EPS with the year to date SMP figure.
Thank you.