One solution that fixed this issue with my ISP was that when I went through the first and second line and got in touch with the people that fixed my problem, I asked them if they could give me one of their personal numbers in case the same problem happened again. The problem did occur a couple more times, and I just directly called the same guy.

I find most tech support is filled with inexperienced and frustrated staff who just run off a script. They're not paid well. They are Tier One support to filter out most of the incoming calls. Tech support is designed in tiers.