Who ordered the work.......you or the insurance company? Normally the entity that orders the work is responsible for payment.
Did you sign a work order?
I would start by installing a booster pump. I have gotten pretty good results with them in those situations. It may satisfy you. Relatively inexpensive and easy. I would shy away from the HF product. Go Goulds or Grundfos
As mechanically inclined people that we are we take so much for granted. So many in the general public are clueless.
A lady friend of mine recently bought a Hybrid. Lots of things she was just totally clueless on. Basically was unable to do certain basic functions and adjustments.