To make a complaint to NHS Cheshire and Merseyside Integrated Care Board (ICB), you can contact their Patient Advice and Complaints Team via phone, email, or post. You can also raise concerns with the service provider directly or through the Patient Advice and Liaison Service (PALS). 

Here's how you can complain:

1. Contact the NHS Cheshire and Merseyside ICB:

• By Phone: 0800 132 996.
• By Email: enquiries@cheshireandmerseyside.nhs.uk.
• By Post: Patient Advice and Complaints Team
  No 1 Lakeside
  920 Centre Park Square
  Warrington
  WA1 1QY