Same thing happened to me, I thought the phone was officially paper weight.
But it can be recovered!
Download A2 uploader and reflash your phone - both the "main" and "fs" files you can find in the download section.
The phone should now be able to boot up but will give you an error message of configuration error please contact service provider. This is because the custom pack files are missing. You can also find the appropriate custom pack from the download section.
After loading all 3 components - main, fs and custompk
your phone should be restored.
hope this helps