I am happy to assist in updating the phone features for you. You can also do this yourself through our website https://business.comcast.com/myaccount or you can disable this feature through our app as well. If you would like my assistance please reach out through private message with the name, address and phone number on the business account?
Before posting here, I checked on the web portal but was not able to find a place where I could permanently disable call waiting on my lines. Could you let me know where exactly on the website this can be done?
Also, I will reply in a PM with the name, address, and phone number on the account as you requested.