Wifi won't turn on and keeps on "activating.." sign

i have a samsung galaxy a7 2016 and i have a wifi problem, whenever i want to connect to a wifi network and turn the wifi on, it keeps saying " activating.. " and it never activated and the the activation button remains on a gray color; i have tried to hard reset it and update the version of the Android using a computer, but it didn't help at all, please any suggestions that may help me, thank you in advance.