Multiple Ping Spikes and Packet Loss Per Hour

We have been facing a horrible packat loss and ping lag spikes for the last 2 weeks. Here's the time-table:

10/4: Sever packet loss occuring every 5-10 minutes lasting ~30 seconds. Online services would dissconnect, and any devices connected to the network would not load anything.

10/10: Technician arrived and switched the panel and a few connectors where the modem is wired to via coax cable. The problem persisted.

10/15: A different technician arrived and switched some connections in "the box outside". This gave us a very minor improvement. Instead of facing entire packet loss every time, our ping rate would significant spike - occuring every 2-6 minutes. When stable, our ping is ~22ms and getting 500+ upload which is great, but we've seen spikes as high as 700ms and occasional packet loss entirely. These interuptions only last about 3-5 seconds which is an improvement. However, it makes real-time online activites an extreme hassel. For online gaming, there is severe rubber-banding and latency issues when the spikes occur. With Zoom meetings it will interupt screensharing and incoming/outgoing video and audio feed. With live TV streaming there are constant interuptions.

10/18: The same tech from the 10th came back and tried everything he could think of, including swapping out our XB7-T modem with a new one; however, the problem would still persist. He called an Xfinity mantience memeber to inspect the wiring, and he claimed to have solved the issue but nothing has changed. The tech said that I should just be contempt with the ping spikes and interuptions, but we're paying over $50/mo, and I believe we should be getting what we are paying for and shouldnt be OK with sub-par service when it was working perfectly fine before. Below is an example of the spikes from a command I use through Command Prompt app. Any help would be appreciated!

Reply from 8.8.8.8: bytes=32 time=19ms TTL=56
Reply from 8.8.8.8: bytes=32 time=21ms TTL=56
Reply from 8.8.8.8: bytes=32 time=20ms TTL=56
Reply from 8.8.8.8: bytes=32 time=30ms TTL=56
Reply from 8.8.8.8: bytes=32 time=13ms TTL=56
Reply from 8.8.8.8: bytes=32 time=547ms TTL=56
Reply from 8.8.8.8: bytes=32 time=348ms TTL=56

(^^^This is where we would see severe interuptions with gaming/streaming/video calling)
Reply from 8.8.8.8: bytes=32 time=21ms TTL=56
Reply from 8.8.8.8: bytes=32 time=25ms TTL=56