Kenny Waddell, a customer from the Berwick branch of national builders' merchant, MKM, will be taking his son Graeme along on the trip, which includes both flights and accommodation.
The competition was run throughout June and 36 MKM branches across the country took part. Customers simply had to make a purchase of 100 or more to be included in the draw, which saw over 6,000 people enter.
Kenny, whose joinery business is based in Greenlaw, was taken aback to hear the news that he had won.
He said: "I knew all about the MKM World Cup competition, but when I received a call to say I had won a prize I never thought it would be that!
"I'm really looking forward to soaking up the atmosphere in South Africa and watching some world class football. My son and I are keen football followers and always try to see our national team, Scotland, when they play at home.
"I have never been to an away game so this will be a great holiday - I'll just need to buy some earplugs to block out the vuvuzelas!"
MKM's Berwick branch director, Brian Morton, added: "I'm delighted that out of 36 branches, it was one of our regular customers that won the competition. We have been running World Cup-themed trade days and events since the start of the tournament to help our staff and customers get into the spirit.
"All of us at the branch are wishing Kenny and Graeme a great time and are looking forward to hearing about their trip!"