hardeep, first of all you dont really need to panic, it would be very helpfull if you tell me what fuse settings have you used, and the remedy is quite simple, if your having a oscilloscope cro, just feed square wave of say 4mhz frequency, or another alternative is make a rc circuit calculate the value of freq , feed it to xtal1 pin xtal2 pin would be ground, you surely would be able to revive your uc 
Regards,
Ankit