How do I get Spectrum to recheck the local node?

I have been a long time customer, and except for the occasional outage I have never had issues. However, about 4-5 weeks ago I started getting latency spikes several times a minute. Some long enough to disconnect me from what I was doing. I had Spectrum out on 3 occasions with the last trip they brought 2 techs. Each time they checked my lines, on the second appointment they changed my modem but they all checked, I guess, an app Spectrum has for techs and they all said there was an issue with the node on their end and it would be fixed.

On the last trip I told them to please not leave until it was fixed. (It had been going on 3 weeks) so they called their supervisor and he said they would send a repair guy to fix the local node and I should be fine within 24 hours. Guess what? It was fine within 24 hours. It worked. For about a week. Now its happening again.

I told Spectrum support I don't need an appointment, I need them to check their node again but they insist that they can only send someone out. Before it was less than 24-48 hours for each of the three appointments but now, they are telling me its going to be 5 days before they can come. I don't need them to come! I just want them to check the node again, see it isn't working and fix it this time. I tried to escalate and they said that dispatch would call me back. When dispatch called 3 minutes later they said they could only move my appointment up if someone canceled between now and Wednesday and they were sorry. I need my internet this weekend..... The amount of aggravation I am having over this is starting to build. I was very patient and understand for the first 3 weeks despite not even really being able to use my internet for the reason I got it. Now, I am just ready for this to be over.

Is there anything I can do?

Thanks :)