Battle.net Connection PROBLEM

So i have been having connection issues with Battle.net along with other game launchers, for some reason I have internet connection and webpages load properly along with video playback etc. But i cannot connect or go online on battle.net along with steam and riot. When I switch to tether to my phone data i can connect. I am not sure what is causing this, i have cleared my network setting reset my router reset my adapter uninstalled and reinstalled battle.net and it still has the same issue

Since you’ve already isolated it as an issue with your internet connection, the most likely way to resolve this is to speak with your ISP concerning their equipment and routes.

im having the same issue any fix yet?

Yes, the first poster had a problem with their internet that impacted connections to multiple games. They found that using a different internet connection via their phone hot spot worked around their ISP issue.

However, its not a solution to use 4g all the time. Its very unstable and I get kicked out of games a lot. Would like to know what should I change in router settings for it to be able to connect to battle.net. Tried whitelisting the IP, but there is no such an option in my TP-Link Archer C6