Well, I have this problem too and I'm still having it. My ping is always 265-280. Sometimes It is 300+ especially when there are 900+ players online. You should try simple solution like turning off your router then turn it on after 2-3 minutes, it worked for me. I suggest you to turn off your router's wifi when you are playing. You can close running apps like ( Skype, Steam), I would recommend you to stop them in task manager. They uses 1% of your network. If you're still facing this problem, you should contact your Internet Service Provider (ISP).
By the way, are you romanian?
You can try this program cfos Speed. It helps in reducing ping. Even I use it and I'm satisfied with the results. You will feel the difference when you use it.
https://www.cfos.de/en/cfosspeed/cfosspeed.htm