Netgear EX2700 WiFi extender suddenly stopped working?

Hi, I brought a Net Gear N300 EX2700 WiFi Range Extender on 9th January 2018. It had been working great until yesterday, all of a sudden yesterday, all my devices were able to connect to the extender but there was no internet. I connected the devices to the router to check if the Router was the cause, but the Router had no issues and had internet. I checked the lights on the Extender, and every light on the extender was on and Solid Green. I have Restarted the router at least 3 times already (I made sure to give it at least 5 mins before restarting again, and when I turned the power off for the extender, I made sure to wait at least 30 seconds before turning it back on). I even Factory reset the extender and reconected it to my router but no luck, it keeps giving me the same response, all lights on and Solid Green, but no internet. On my devices, the messages change between 3 messages: "Connected, No Internet", "Authencation failed", "Failed to obtain IP Adress". I have spent hours trying to fix this issue, have looked through many forums and guides, even re read the entire manual around a dozen times and still no luck. This is my last resort, I don't want to replace this since I've only had it for about 7 months, not even an year. 
The main Device I connect to the extender usually is my mobile smartphone, Samsung Galaxy S6 SM-G920F

Any and all help is appreciated, Thanks.