Thank you very much JBY I had been thinking about this again and again and getting tensed.Don't worry many people have the same issue, simply get a new LATEST employment letter on official letter head from your current employer. DIAC will calculate your experience based on the date of your latest employment letter. As long as you are on the same job and didn't change employers or job title.
Also, I would be thankful if you help me in clarifying that what about the state sponsor in this case as state has demanded 3 years exp but they have not demanded and employee reference letter . Viktoria has only have demanded ACS in document checklist.
How will they look at this.