Weak signal coming into house confirmed by tech but not fixed

Hello,

We have been experiencing pixelated and slowed streaming and breaks/slowdowns in connectivity for months. Resetting the box does not help. An Xfinity tech came out and confirmed that the signal coming into our house was too weak (on 6/8) and that an adjustment needed to be made at the pole a few yards away. He said another tech would be out within 48 hours to fix it, adding that I should call if it didn't happen. Well it did not happen and I cannot find a phone number for dispatch.

I used the chat service on 6/16 and the tech (name withheld) said that he had scheduled service for that very day between noon and 2 p.m. Additionally he said he put in a request to credit my bill. Nothing has happened and our service continues to be lousy, and no credit has appeared either. I have screen shots of the chat.

How do I get a commitment to fix this once and for all? Thanks.