The upgrade was free, so what are you complaining about?
Also, Id check if the upgrade has actually taken place. Go to
http://root:root@192.168.100.1 and look at the operation configuration for the modem.
It should show 2048000 for download and 200000 for upload if you're on 2Mbps. If it shows 1024000 and 100000 then you're still on 1Mbps and need to ring up to get it sorted.