After 19 years you could not contest having signed away whatever you were supposed to inherit and if the estate was worth as much as it was, I don’t know why you agreed to do that because it doesn’t make sense even if whoever it was going to contest it, contested it.
If however you were told “relinquish your claim on the estate, we won’t contest it and we will make sure that you get X Y and Z now or over the years and we will leave the business to you when we die”, and you relinquish your claim and they don’t do any of that, then you have a claim to make in what is called Promissory Estoppel.
It is a legal doctrine and not for the fainthearted. You are certainly going to need to get a solicitor to deal with it because it is about as much a DIY job is taking out your own appendix in the dark with the blunt spoon.
When speaking to the solicitor you are asking about bringing a claim in Promissory Estoppel. Not all solicitors deal with it so you may need to make quite a few telephone calls.
There is not normally any legal aid.
Can I clarify anything else for you?
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