If you, or someone you know receive a lot of nuisance calls then it might be worth looking at this offer from National Trading Standards.
They have limited funding to be able to provide trueCall Secure+ call blocking devices to those in need.
You can read about the offer here https://www.friendsagainstscams.org.uk/callblocker and use the links on that page to check your eligibility and apply.
It looks like the funding is very limited, so if you want to investigate, do it sooner rather than later.
The device that they are offering can be found here https://www.truecall.co.uk/shop/truecall-secure and of course can be purchased independently if you can afford it and have the need. But if you can get one for free please follow the links above.