Verbal agreements in this instance mean absolutely Zero.
Your Mum's wishes are expressed in her will and should be honoured.
You have had some good advice in response to your thread, but you appear to be defending your Aunt going by your replies.
Bottom Line: IF YOU WANT YOUR CASH, ENGAGE A SOLICITOR NOW.
Defending her? Absolutely not I'm fuming over it but she just dismisses me when I begin conversation.
I'll see her Tuesday, try again and go from there.