League servers disconnect my internet from the house

I have seen other discussions about people having this issue but i haven't been able to find a solution. Whenever i get in the loading screen and it reaches 40% my internet disconnects from every other device and it gives me an error saying no internet connection. I was wondering if anyone here has been able to find a solution for this. I haven't been able to play league for like 10 or more days now. Note that i did send a ticket to the support team but they have told me that the problem is probably from my ISP's side. I did contact them but they don't really know what to do. All i did till now is reset my router but that didn't help.