Hello guys and thank you @Zorro !!!
I bought this 4A gigabit router and it came with chinese firmware and also I was not able to get the WAN
running properly, it had and older version 2.28.18 so might have been some bug.
I flashed it with the latest EN 2.28.132 firmware you provided, plus added english and everything now works like a charm!
I would really like to try openwrt in near future (never had before), so will definitely try using your method, and possibly come back here with the result.
God bless these guys, they are geniuses.