Please help from the community , Whatsapp Heads up Notifications

Hi guys,

Totally desperate, I uninstalled the whatsapp on my stock 5.1.1 S6 edge and I installed again.
After that is impossible to disable the heads up notifications, I already disable the option from the whatsapp menu but are still there.
I uninstalled again the whatsapp (I delete the whatsapp folder after uninstall the whatsapp) and I wiped the cache and I installed again and I still have the issue.

I want to avoid a factory reset.

Any Idea.

Thanks guys!!