Why can't you claim compensation for your loss? You certainly can try, but Apple's warranty and service information clearly state that data will be lost. If you didn't pay attention to that information, which you admit you were told, that's not Apple's fault.
As to loss of service during the time your iPhone was out of your hands, again, it's unlikely that you can get any compensation. But you can ask. If you are in a country where service is provided by the cell carrier, then you would have to discuss the issue with the carrier.
As Peter said, we're just fellow users here so arguing with us will serve no useful purpose. Try arguing with Apple, though I'll wager you won't get anywhere.
Regards.