Stock firmware issue

I bought my tablet and the OS had crashed, its a Galaxy Pro 10.1 SM-T520. I downloaded the ODIN utility and after reading flashed it with the files a webpage had linked to. Well it worked however its a CHINA OS and is very limited, not Play Store and some weird CHINA apps. I have tried about 5 times since downloading different files but they are all .tar.md5 and will not work. They all claim to be for my tablet one was Canada, NOPE, just crashes installing it and soft bricks the tablet once again. One was for the USA same thing crashes.

The first time I has 3 files a BL, CSC and an AP file , 3 individual files and it fixes it everytime I re-crash it, but NONE of these tar.md5 files work!! What is the deal???