Hi @hamsarris,
Our apologies for the trouble experienced. We have been working closely with the review team to ensure these issues are resolved in the latest release of the plugin.
The latest version of WP Live Chat Support includes a complete security update which prevents further attacks and attempts to remove any code injected by earlier attackers as well.
We do realize this has affected a number of users and we do apologize for the inconvenience and frustration this has caused.