Changes to my account- poor customer service

I have been trying for 2 1/2 hrs on chat to change my services. I talked to three people and was disconnected all three times. With the second person I talked to, I made it all the way to accepting the changes, and I went back to tell the rep and she had disconnected me. Each of those reps came up with three different premiums. The last rep I sent him copies of the accepted document from the previous rep and he still could not match it. So basically he said, I can’t do anything about that. Extremely frustrated with this whole process. My changes have still not been made. I am beyond frustrated.