Mrs S’s son said she sang in two choirs and played tennis twice a week.
“It was just delay after delay,” he said.
“My mother and I kept asking questions and for updates but never got anywhere, and the whole situation was just confusing and frustrating.
“If she had received the care she should have had then her quality of life would have improved and we may have had more time together.”
He added: “I just want the trust to be held to account. I don’t want another family to go through something like this.”
Paula Sussex, from the PHSO, said the trust had worked to find an effective operating model “including leadership changes and a new programme to better listen to frontline voices”.
It recommended it “investigate its performance against national targets and make a robust plan for how it will improve”.
She added: “Because of this investigation, other patients and families should experience wait times that are in line with national guidance.”