Whatsapp restore issue for Iphone 4
I am using Iphone 4, 7.1.2.
I couldn't open my whatsapp since yesterday morning. Also, I didn't notice that I turned off the whatsapp auto-back up since long time ago.
Firstly, I did full back up via Itunes with my Window laptop and there was an option to back up Iclouds via Itunes too. After these 2 back ups were done. I deleted my whatsapp and reinstalled it, it turned out that it was restoring from my Iphone's Icloud was dated on Aug, 11th. In fact, I never turned on Icloud backup on my Iphone. I lost all my whatsapp messages, photos, videos in a month and so on since Aug, 11th.
After that I restored everything on my phone via Itunes and I was hoping to get back all whatsapp things from my latest Itunes back up, yesterday 7pm. It didn't work and my latest messages was still Aug, 11th.
Any suggestions for the next step? Thanks.