Help required for softbricked A311

[ShikharGupta]

My Nitro A311 suddenly stopped working and came into bootloop. I went into TWRP recovery and tried to factory reset, flash a custom ROM and restore a nandroid backup but none of them worked. Every time, it showed the error of unable to mount cache, data and system. The File Manager shows the size to be zero. I think even the partitions somehow got deleted.
I tried YGDP tool too. The process completed in just 2 minutes but the problem still persisted.

Here is the message logger for the YGDP tool.

15:15:34 CELL0: Software Version: Assembly - <V3.83Beta_140404_06>
15:15:34 CELL0: Cell 0 USB address is: com5
15:15:34 CELL0: Start Download.
15:15:34 CELL0: Download Started...
15:15:34 CELL0: Downloading CPB:
15:15:34 CELL0: Init Connect Arg.
15:15:34 CELL0: Downlaod DA Start.
15:15:37 CELL0: Downlaod DA Success.
15:15:37 CELL0: This CPB for the Phone don't support Check CID.
15:15:37 CELL0: Verify is Partition be Changed.
15:15:37 CELL0: Partition is not Changed.
15:15:37 CELL0: Get Usb Status Success.
15:15:37 CELL0: Read YL-Parames Partition Start.
15:15:38 CELL0: Read YL-Parames Partition Success.
15:15:38 CELL0: Check between YL-Parames Partition and PhoneInfo Start.
15:15:38 CELL0: Check between YL-Parames Partition and PhoneInfo Success.
15:15:38 CELL0: Init BackUp Table.
15:15:38 CELL0: Read BackUp File Start.
15:15:44 CELL0: Read BackUp File Success.
15:15:44 CELL0: Start Download CPB.
15:17:01 CELL0: Download CPB Success.
15:17:01 CELL0: Download Read BackUp File Start.
15:17:01 CELL0: Download Read BackUp File Success.
15:17:02 CELL0: DisConnect.
15:17:22 CELL0: Total download time elapsed: 1 min : 48 sec
15:17:22 CELL0: Downloading CPB: Successful!

Is there any way I can restore my TWRP backup or flash a new ROM?

 

[buggynotme]

bro you didn't choose correct model from.list

 

[ShikharGupta]

bro you didn't choose correct model from.list

firmwarefile.com/micromax-a311
I chose the cpb file from this link and selected the configuration as 8297W. I think that it is correct. If the model was wrong, then the process wouldn't even have completed. Instead, the process completes successfully, but the phone still remains in bootloop.