Good advice from @stumpyjon
It’s a question of personal priorites and what’s best for you.. you could fight it and still end up out on your ear with a slightly better deal than what’s on offer, but you have to balance that with the stress and effort on your part, that might well be put to better use by cutting your losses and focus your efforts on moving on, on balance.
I ain’t saying it’s right, I’m just being realistic.
That said, its worth a consultation, most solicitors will talk it through with you for free, assuming you have all the info they need to hand, so they can advise you properly…so you can then better decide whether to persue it legally or cut your losses.
If you are really stuck for a recomendation, you can try some of these sites:
https://www.reviewsolicitors.co.uk/
https://www.solicitor.info/