The scatter file is not an iso file . Yes spflashtools would be like odin for samsung but with more options .The scatter file gives the flashtool all the information it needs to load all the .image files it will flash and to which blocks to flash them ..
Inside the stock rom zip there should be a scatter file and a number of .image files for example recovery.image boot.image system.image
You are wasting time with fastboot commands and you are going to end up flashing something to the wrong block thereby bricking the pad further .
Use the specific name and chip number to google and find the correct STOCK ROM
Download flashtools and flash it . Most flastool zips or blogs explains with video how to load the scatter file and flash the rom
Search on google
How to flash stock rom
Stock rom * your device and model here
The list of files is like follows:
preloader_p301_h82.bin (the same model shown in product info with the command fastboot getvar all)
In other hand, I readed the way to write IMEI, wifi and BT but, is there any way to extract those addresses from the tablet, that is because like I said, the tablet freezed and didn't booted properly again, so, I don't have any of those addresses.