Checking with their site, found that the redirection was done manually using the program in your index.php, then went back to their own cPanel on this issue and was following in the past.
Redirect from one domain to a sub-folder is only possible using the same programming as was done for their part, since cPanel can not accept because of the following information that is passed by the panel:
Redirecting to
https://hostime.com.br/whmcs will cause a redirection loop because 'http://hostime.com.br/'
which is located at /home/user/public_html/ is above 'https://hostime.com.br/whmcs' which is located at /home/user/public_html/whmcs