Debrick failure (xiaomi 4a Gigabit edition)

Hey guys
I'm fairly new to openwrt
I recently got a xiaomi 4a Gigabit edition and installed openwrt on it. Unfortunately the performance sucked and the internet speed was terrible i mean it took 10 secs to load a page
I disabled ipv6 and used flow offloading but no luck.
So i wanted to revert back to stock firmware but non of the methods such as TINYPXE and xiaomidebricktool worked. The firmware version before i installed openwrt was 3.2.34
I get blinking purple light after uploading bin files.
Plz help if you can
Thanks