Amibroker is just a tool and Datafeed is seperate. Itz like.. Amibroker is Gun and datafeed is Bullet. What you bought for the first month for 2500/- is one month worth bullet and he probably gve you Ami free (guessing a cracked version). So itz usual nothing surprising dt your data subscription expired after a month. You can go with the same guy or there are many data provider. Google it..