Williams has managed the best goals conceded per game ratio so far this season, having been beaten only twice in five league games with Matsatsantsa.
However, the 24-year-old shotstopper was rather surprisingly left out of Shakes Mashaba's squad to face Burkina Faso and Ghana in back-to-back fixtures this past week, with Itumeleng Khune, Brighton Mhlongo and Jackson Mabokgwane all called upon.
He was last selected by Mashaba for their two-legged preliminary World Cup qualifier against Angola in November last year, but has not been capped since Bafana's goalless draw against New Zealand in an international friendly, under former coach Gordon Igesund.
Despite his encouraging form of late, Williams feels his snubbing came as "a slap in the face", especially with both Orlando Pirates' first and second choice goalkeepers getting the nod.
"For me, not being there [in the Bafana camp] is like a slap in the face with someone like Jackson [Mabokgwane] being called up, [even though] he hasn't played [at Pirates]," said the Port Elizabeth-born 'keeper bluntly.
"Obviously, I would love to be there. But like I said [previously], when I wasn't called up last season, I knew that I wasn't doing well.
"My team wasn't doing well and I was conceding a lot of goals but now, I mean, I've been keeping clean sheets and I've been doing well.
The former junior international, though, remains optimistic of getting another bite at the cherry with the senior team, and says his solid start to the season has come as a huge confidence boost.
"I just need to knuckle down, keep working hard and, when my [next] chance comes, grab it!" he added. "As you can see, with the start [to a season] I've had, I've only conceded two goals in five games.
"I don't know when last I've had a start like this, and it's bringing back my confidence. I'm working hard with the goalkeeper coach and the other keepers as well.
"Hopefully this season can be a good one for me, and I can bring back the old Ronwen of before," he concluded.