You'll most likely find you are on the CSS - this means that a device on your network has been seen sending Spam, you need to do checks with an antivirus program as well as a separate anti malware program such as Malwarebytes. You must check and and all devices. If you attempt to remove your IP from the CSS without dealing with the root cause of it being there, you will simply end up with it being listed again.
Only use Helpful answer if your problems been solved.
Finally, found the culprit, all systems were disinfected, newsletters unsubscribed and emails flagged ruthlessly as spam, washed with ccleaner and adwcleaner then anti-virused. then spamhaus checked and IP duly delisted, waited a few hours and now life is back to normality.
Thanks for your help, hope I can find it again if I need to.