Is it also unreasonable to assume that they wouldn’t be falling over themselves to get the lift company there to fix it, pronto.
On that point alone, I’d have to say yes it probably is unreasonable to make that assumption. Why wouldn’t any SM or SC call the lift company if it’s a no cost to them warranty issue? There’s likely to be a lift service contract in place too. So cost shouldn’t be a factor in their decision.
So I’d think some evidence of the SC’s or SM’s neglect on that point would need to be presented to a Tribunal. Not great for the OP, especially considering all their previous issues with the SC, but it seems to be the way Tribunals and Courts work.
Perhaps the OP did present that evidence?