Poor technical support

I have been a Comcast/Xfinity customer at my address since 1994. I have both internet and cable TV services. Over two weeks ago my service became intermittent. After troubleshooting with both the Xfinity chat bot and the modem and router manufacturer’s tech support, I made an appointment for a technician to come to my home. When he was here the internet/cable were functioning and he thought it was my equipment. To rule out it being my equipment, I had him activate an Xfinity modem/router. He was unable to check the cable or line itself from the street to my house as he didn’t have a ladder. The problems continued but also gradually decreased in frequency. Since the problems continued, I reactivated my own equipment and returned the Xfinity modem/router. The system remained fairly stable for several days, only dropping out briefly once or twice a day. However, the problem has once again increased in frequency to several times a day. I have scheduled another appointment for a technician visit. However, the next appointment is not for another four days. I finally got through to a person on the telephone who wanted to take me through the same checks as the chat bot and was unable to expedite the issue so that I could get a technician sooner than four days. I have been trying to get this resolved for weeks! This is not good customer service.