I have a problem with high ping

Well before 1 week i started having problems on games. Like 5-6 times on each game lag spikes rushing my ping over 2000 and my game like freezes and then goes down to 35. This was happening every single game atleast 5 times. Then i thought it was because of my internet,because i was using wifi. Then i changed to ethernet cable connection and.. nothing changed. I have the same lag spikes in everygame, sometimes i have them less, but i have them. I've watched over 10 yt videos and topics in google how to fix my ping and i did everything possible and nothing works. Im not saying anything but is it possible to be because of the riot servers? The last thing i can do is just reinstall league but i will it help?
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