I have had many bad experiences with GTE (now known as Verizon) over the past few years. This page contains these problems. (I still have to jog my memory so I can remember the past details.) This page will updated I am sure, since I continue to be a Verizon customer and I know that my problems will continue.
So I called back on Saturday and they never new anything about my requested change. So she entered it in their computer and told me to not call back until Thursday to find out what my scheduled appointment was.
My brother also was changing ISPs -- and his change only took a few minutes. I called GTE to ask about my ISP change -- and this person said that there was no request to make an ISP change for me. So my brother contacted the person who did it for him; she was leaving but she said she would set me up when she go in at 4:30 the next morning. When I got up my DSL was connected.