Following the recent and ongoing issues with flooding please find below a link for residents who wish to make a formal complaint to Anglian Water:
other useful information
Standards of service customers can expect https://www.ofwat.gov.uk/households/supply-and-standards/standards-of-service/
Another useful website is: https://nationalfloodforum.org.uk/
And finally if anyone is impacted please also contact your house insurance as they may be able to undertake the clean up and then recharge Anglian water.