Software upgrade broke my phone

Received notification to update software on my Samsung s3. Completed the installation restarted phone. Next thing phone does not pick up the imei or the sim card. Took it to the service centre they want to charge me over R2000 to fix it. *** shud I pay R2000 when my phone was working perfectly fine until I told to update the software via the system notification itself. This is not fair. I feel ****med by Samsung.