Slow import/ not importing all content

So when I import it takes hours and when it stops running not everything has been imported over. I was getting an error in my log file

PHP Fatal error: Maximum execution time of 30 seconds exceeded in C:\wamp\www\wordpress\wp-includes\class-http.php on line 1127

I changed in the php.ini code to change the execution time to 90 seconds, but I get the same error with just 90 seconds instead of 30. I try running it again and it gets some more content but takes a couple hours.

Also my company bought the premium version with the user groups and virtuemart plugins to bring those over but has yet to import them(3rd time running the import since it seems to grab more content and users each time.). Also it does not seem to be importing the navigation menu. I sent a contact form on the site which is what your suppose to do if you buy the premium (on 7/10/2015) and have not heard back. Looking for some pointers on how the behavior settings should be set as well as helping with these issues we are having.

https://www.ads-software.com/plugins/fg-joomla-to-wordpress/