Pensioner George Haynes says he's been plagued by nuisance calls in recent years.
"They became more and more frequent and now average about two to three a day," he says.
"The most I've ever had in a day is nine."
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The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.
Steve Ashton's picture of a jacket potato and corned beef served to his 81-year-old mother has been shared 130,000 times on Facebook.
The Welsh Conservatives pledged 'continued economic recovery' as they launched their manifesto in Builth Wells this afternoon.