A Dinas Powys pensioner living with diabetes says she is frustrated by confusion and a lack of communication in monitoring her health.
A new reports says the NHS in Wales is not giving enough support to meet the needs of people with chronic conditions.
The Senedd's health committee is calling on the Welsh Government to refocus its efforts on delivering "people-centred care", including integrated services for those living with long-term health concerns.
Sylvia Penny, who's 74, has a number of conditions including type two diabetes and Bilateral Bell's Palsy.
She said: "The care, when I receive it, has been exemplary, but the route of getting to it takes too long."
"You get sent from pillar to post, and there is a lack of communication between departments leading to more confusion to navigate. It's a waste of time, effort and money for everyone involved."
"Several times I have been prescribed the wrong medication, which has made me unwell, which means more time and effort to have it corrected. It makes it difficult to know who is responsible and whose opinion I should trust."
"A lack of diabetes monitoring has led to the development of a third nerve palsy, which has led to more tests, treatment and medicines. This continues and I am very grateful for the care I am now receiving from the hospitals."
Public Health Wales figures suggest 46% of adults experience chornic conditions - and 19% have two or more long-term conditions, with such numbers expected to rise.
People living in deprived areas are more likely to develop health concerns when they are younger - and are expected to have at least one condition by the age of 50. As such, they require more NHS support because they spend fewer years in good health.
In 2018, the Welsh Government published a long-term plan that set out its ambitions for patient-centred care, focusing on co-ordinating tailored services for individual needs.
"A Healthier Wales" highlighted better co-operation across departments, specialist nursing support, 'one stop' clinics and advise on diet, exercise and wellbeing.
But the committee said ministers' ambitions were far from those of what patients experienced.
It heard how people's conditions are treated in silos, with no shared decision making, leading to delays and confusion as patients struggle to navigate the system. The report also highlighted "a worrying lack of mental health support, especially at the point of diagnosis."
Russell George MS, who chairs the health committee said the Welsh Government was "still failing to provide the support people need to live well for longer", despite repeated calls for action.
He added: "This failure not only impacts individuals' quality of life but also places an unsustainable burden on our NHS."
"While much attention has been concentrated on NHS acute care, there has been far less focus on people who rely on regular access to healthcare to manage one or more chronic conditions."
"We have made a number of recommendations to improve the situation, but ultimately, we are looking to (the) Welsh Government to take immediate, decisive action to protect the health of the nation and the future of the NHS."
The committee's report, published on Wednesday, makes a total of 21 reccomendations, including greater emphasis on preventing health deterioration and alleviating pressure on services by reducing the need for emergency intervention and hospital admissions.
The Welsh Government says it will respond to the report's findings in due course.
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