Heat related outages = Trying to sell me more services

The first three days of this work week were really hot (90's) here in Maryland.  Since we got our service back in October, it has worked perfectly.  On Monday, once we hit the really hot part of the day, we lost our connection over and over.  It would drop out, reconnect, stay for 5, 10, 30 minutes then drop out and reconnect again.  From Monday-Wednesday, come around 1 PM and running until about 4 PM, our connection would drop out at random.  Outside of that time range, everything worked perfectly with no signal loss or reconnections.  Some years ago, we had a similar such issue where a component in the nearest concentrator box was being affected by the outside temperature.  When we hit the magical temperature, the signal coming from the concentrator box would drop out.  Once the good temps returned, the signal would come back, and everything would be fine. 

On Wednesday afternoon I chatted with Xfinity support online, and thought the fellow understood what was going on, but instead of saying someone would be sent out to check things along the line to our house, he wanted to sell me the upgraded gateway with the cellular backup.!!! I was a bit confused and even asked him about the provider of the cellular service as we are in a spot where Verizon and AT&T signals are horribly weak.  Backup sounded good, but a [Edited: "Language"] super low speed cellular connection isn't worth paying a nickel.  When he wouldn't/couldn't answer the provider question, I disconnected from the chat and just shook my head.  Next thing you know, I got emails, IN SPANISH, trying to get me to complete the transaction for the upgraded router with the cellular backup!!!

For the last almost two days we have had cool temperatures and guess what?  Exactly!  We have had zero signal losses with no gateway reconnections.  What a surprise!

So, I have to ask, WHAT [Edited: "Language"]?!  I contact Xfinity support with a technical problem involving equipment not at my house, then have the Xfinity rep tell me over and over that he understands the issue, and he tries to sell me the upgrade to a new gateway for $15 extra a month with a backup mechanism that almost assuredly will not work at my location.  And since I did everything in English, why in the world did I get emails in Spanish from Xfinity?