Back to basic:
Good day mate, How ya going.
Please improve your English speaking and listening for great chance to get to work and to consider your request for a pay increase. Most Australian employers want there immigrants employees to become good in english speaking. You can barrow English learning books at your local library to improve your English skills. You can also buy a workbook on this site: www.ames.edu.au
You can also check if your eligible for free Australia Migration English Program:
link: http://www.immi.gov.au/living-in-australia/help-with-english/amep/
I recommend this workbook with cd and dvd:
Living in Australia Beginner
Living in Australia Post Beginner
Living in Australia Intermediate
link: http://ames.edu.au/publications/course-materials/
*for Listening
English Everywhere Everday
Listening to Australia: Beginner
Listening to Australia: Post-Beginner
Listening to Australia: Intermediate
Listening to Australia: Advanced
link: http://ames.edu.au/publications/listening-materials/
These books are costly but you can barrow in your local library.
Have a good one! cheers! 😉