Refund Unnecessary Components

So, our geyser stopped worked and I submitted a claim with Standard bank Insurance. They then sent Likhaya Plumbing to assess the geyser. Their plumber does the assessment and decides that an element and another component need to be replaced.

After the replacement was done the geyser still did not work. Called Standard Bank again who sent out different plumbers to assess. These plumbers' states that the geyser is burst, but it was burst before the previous plumbers installed the components that I was charged for - they removed the components and showed me how they could tell.

The new plumbers replaced the geyser, and I paid the excess, now I'm stuck with geyser components that I do not need and all Standard Bank can say is that they do not cover components, but it was not a component issue in the first place. should they not get their contracted plumbers to refund me????