I have no idea. The link was shared to me by the lady who runs the Northern Ireland Facebook Motability group and she seemed to think that the action was valid and that the journalist would be helpful.
As @Woodpecker says, you did what you did in good faith, and you have nothing to be sorry for.
I would not expect the leader of a Motability Facebook group to lead you down the garden path with false information.
Besides the google link you provided stacks up with one such organisation (DPAC UK) who are one that has now sought legal advice to see whether these changes are unlawful under the Equality Act.
A legal challenge was also officially launched on or around 9th April under sec149 of the Equality Act 2010, with a Pre-Action Protocol Letter Before Claim has been formally served on HM Treasury in respect of proposed Judicial Review proceedings concerning recent Government policy changes impacting the Motability Scheme.
There also a different take with A proposed judicial review over changes being made outlined in the Business Quarters link above.
You were not wrong to post what you did, as there definately seems to be something going on in the wider network. Whether anything does come from any of them is unsure, but no one on here is solicitor specialising in th the Equality Act and therefore can only assume!
My comment on the I Paper, was purely based on, why give them anything, when the I was as bad as other press in publishing hate and then only to be riddled at in the comments.