there is little to see ....
You could see your expected refund, for example...
(look at "Current account value")
Bitcoins from before 21.12.2012: 640.7 EUR
Bitcoins from after 21.12.2012: 0 EUR
Total account value: 640.7 EUR
I have received only 0.8btc.... why

where's the rest

From what I know the actual planning for the reimbursement is targeting the bitcoin lost after 21.12.2012
For the bitcoin lost before 21.12.2013 there will be a second reimbursement plan
So you will receive the other part in the future ... when ? ... I don't know ...