It'd be nice if you could commit to this. If your accountants are lagging by almost 3 months without filing an extension, you owe it to your donors. Blaming the accountants is fine, but in the end, you picked them, and you chose to stay with them.
(The value in the overcharge is really just that you've got a big bullseye you can throw darts at when accountability is required. This doesn't resonate with most entrepreneurs e.g. here on HN - as the greyed out comment alludes :) - but it does with more established firms largely for this reason.)
Unless there's a specific reason why these accounts should be done on paper, the more reasonable and cost-effective solution would be to switch to an accountancy practice that isn't stuck in the past and there are plenty of those beyond the "big 4".
> It is due to the fact the organisation is a community interest company. CIC’s have to complete a CIC34 form, these forms have to be filed alongside the accounts which has to be done via postal methods with a cheque for payment. There is no online method at the moment to file CIC34 forms.
> Companies house, are from what I’ve heard, very particular about the CIC34 forms.
As I put (edited, really) in my top comment, it's mostly just to have an entity you can reasonably go after if they goof.
A related question: Considering how far back this goes, what's stopping you from naming them? Is resolution in progress, or have they just been dead silent?
And why do you care so much who they are? They didn't harm you and in reality they didn't harm anyone. In the real world people don't deal with minor contractual grievances by naming and shaming.
Knowing who's reliable is everything.
The extended thread above yours adds extra light: