I had my call forwarding set to roll over to my cell phone. After some time, I went online to the Dashboard and turned it off. All calls still roll over to my cell phone and continue to do so, even though the Dashboard shows Call Forwarding as "Off."
Please try to use *73 at the dial tone on that phone connected to the Telephone number. If this gives you and acknowledgement CFA disabled, then you should be all set. If it does not then you should call 800-391-3000, using technical digital voice option, ask the technical agent jump into your switch and hard cycle your CFA on/off/on...Sometimes is you use an 11 digits TN, i.e. putting a 1 in front, this features get jammed. Whenever using your *72 CFA feature only use a 10 digit TN because the 1 long distance is not neccessary.