Send Query Result as an Excel attachment in SQL server With Database Mail

Dear Team,

I have below table in the snapshot, My task is to send the same output as a attachment in Excel to email. i used the below procedure 

EXEC [msdb]..sp_send_dbmail 
@profile_name='TSSSendMail',
@recipients='mymailID@gmail.com.com',
@subject='DB Mail',
@body='HI Team',
@execute_query_database = 'DbName',
@query = 'EXEC J16ReimbursementFortnightly1TO15 1',
@attach_query_result_as_file=1,
@query_attachment_filename = 'SummaryReimbursement.xls'

But I am not getting Proper Output, is seems like CSV Format, but i want it proper tabular format in Excel. Please help me