Pulis has spoken of his disappointment at not being able to sign the players that he wanted for West Brom this summer and the manager has been engaging in a public feud with Williams regarding the issue.
Now Pulis has gone on to further speak regarding the matter and has stated that the only way forward for Albion at the moment is by investing on better players to improve the squad which was not really forthcoming during the summer.
Pulis said: "I'm too long in the tooth to listen to people.
"When I first came supporters were moaning about Alan Irvine because he was playing tippy-tappy football and not winning games. So you can't please everybody all the time.
"I've been here 20 months and I think I'm the longest serving manager since Tony Mowbray in 2009. This club is used to changing managers and what you have to do is just see it through. I'll do that. I'll work very hard and give my best.
"When I came, the owner wanted to sell the club and my remit was to keep us in the Premier League and to make a profit. And that's what I've done.
"Now the club is being taken over so we'll see what they want to do. But the only way to take the club forward is by improving the squad."