Cable Modem Dropping Out, Error: 3-Critical R02.0 No Ranging Response received - T3 time-out, 4-Error C701.0 DBC-ACK not received.

Our internet service has been dropping out. I believe this has been going on for some time. I replaced a splitter. I thought that fixed the issue. I bought a new cable modem but after replacing the splitter our internet service started working again until later in the day this past Sunday, 04/09/2023. The internet service dropped out again yesterday morning, Monday 04/10/2023.  I contacted a neighbor on the same street. He is also experiencing outages. I had noticed some Xfinity service vehicles in the area recently. Upon further investigations I found a large hole had been dug out behind a home nearby. There were cables exposed and looked like they might have been worked on. We do a lot of necessary transaction via the internet so these interruptions are becoming a major issue. I am looking for assistance at this time.