I, therefore, request you to take this mater seriously and provide a children’s park as soon as possible.

IS THE  SPELLING  OF MATTER  IN  THE  GIVEN  SENTENCE  CORRECT?

Hello,

@Nevil, your friends Shandilya and Raveena have given the correct answer. The correct spelling of the word in concern is 'matter'. Hope your doubt is cleared.

@Shandilya and Raveena, well done! Keep up the spirit of helping your fellow mates.