I've had a PS4 for about two months or so, and it had connected to the internet just fine, I'd played free games online just fine; everything was fine and dandy. Yesterday I purchased PS Plus and now every time I log into my PS4 the entire internet connection of the household goes out, including the PS4's.
I've messaged PS Support on Twitter and they told me it's not an issue with PS Plus as it's simply a subscription service but instead solely the responsibility of my ISP. I've also phoned up Playstation Support and they told me PS Plus adds features such as cloud storage and the background processes for these features uses so much data that my connection can't handle it. Kinda mixed messages there then. So I'd prefer to ask the community and get genuine suggestions than get some jargon for someone who's just desperate to get on their lunch break.
I don't want to have to change my internet provider just because there's a chance it's causing this, and it would be extremely difficult anyway given that the whole household uses this router and I'm not in charge.
Any help would be greatly appreciated.