Quotes were attributed to the Congolese midfielder regarding his future at the club and the professionalism of his team-mates, with him supposedly naming Arsenal as a team to have made an approach.
However, Mulumbu insists that he was misrepresented and has sought to reassure fans that he is fully committed to Steve Clarke's side.
"I did an interview with a French journalist last week but I am not very happy about how my answers have been reported," he told West Brom's official website.
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"The general point I was trying to make in the interview is that I want to play at the highest level possible. I admitted there has been interest in me from other clubs during my time here but I didn't speak about Arsenal and I also didn't say I would be looking to move in January."
Mulumbu arrived at the Hawthorns in 2009 and recognises that both he and the club have developed positively.
"Not many people had heard of me when I joined West Brom and I have a lot of respect for the club and, of course, the supporters," he added. "We have progressed together over the past five years and West Brom gave me my chance in the Premier League, which I'm grateful for.
"I signed a new contract last summer and my only focus is supporting my team-mates [against Manchester City] and then trying to help the club finish as high up the table as possible."