Split Node

I think you're confused as to what a node split is. It's not something that's done for a single house but for an entire area when the node gets over-saturated. The entire process usually takes at least months, costs tens of thousands of dollars, and involves tons of planning and testing. It's definitely not something you can request to have done. 

Even if your node is in the progress of being split, their level 1 phone support is told not to reveal anything to the customer, since lots of things can fall through or be delayed. Maybe if you keep escalating and non stop complaining you can get someone to informally tell you about the status of the local node. Even then, you'll have no influence on the outcome. 

If you do eventually get the node split, your internet issues will almost certainly be alleviated to some extant. Unfortunately, you've wasted the money spent on equipment upgrades, and I'd advise you to switch ISPs if you live somewhere where it's possible.