Export exit confirmed declarations on CDS

Hello, I am looking for help where there seams to be action suggested for cleared declarations, that did not move to exit confirmed. Therefore, they as far as I know will become invalid after 150 days. How should this be managed if a C1602/3 is not possible or accepted by the post clearance team?

Can anyone help on this issue?

Hi,
The guidance states that If you’ve followed the correct processes for CDS exports but still haven’t received a DMSEOG notification, 
you should: 
• ignore the 45-day notice [DMSGER] and 150-day notice [DMSINV].  
• make sure you have the appropriate commercial evidence to verify the departure.
You may need this for VAT zero rating, excise duty drawback or discharging a customs special procedure with duty liabilities impact. 
You can find more guidance at Customs Declaration Service.  
Other than this you don’t need to take further action nor notify us. 
Your HMRC trader reports won’t show declarations that haven’t received departure status. For any help with live CDS declarations you can use the following link:
Report a problem using the Customs Declaration Service
Thank you