Never once said you had to spend more money on anything. I guided you on how to get help on a Saturday no less. Threatening chargebacks and saying you won't buy any more commercial modules because you can't get help on a Saturday doesn't escalate matters any.
Have you opened a support ticket yet?
While that may be true for you support has set hours Monday through Friday. Once you open a ticket you can expect a response Monday.
Having myself worked with these phones for over 7 years I know for a fact compiled configurations are a thing. Supporting over 250 phones is not an easy task and bugs can creepy in. Please give us time to work with you on this during the normal work week.
Edit: A note on this from the Product Lead of Endpoint Manager on Grandstream XML files:
Non XML are because we do not use XML style. For maximum compatibility (with old phones) we use the Grandstream style config, not the newer XML style.
http://issues.freepbx.org/browse/FREEPBX-9690?focusedCommentId=69201&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-69201