Gilera DNA 125 2001, will not start through ignition?

My Gilera DNA will not start now after i stupidly try to charge the battery while connected to the bike and i believe i put the positive and negative round the wrong way, there was a huge bang and the fuse in the charger blew. Now there is no instrument dispaly, lights, indicators and when i try to connect the battery the bike tries to start itself. The four main fuses are fine - what is wrong/ Please help. Ross