PPTP VPN won't connect

[ApplePi33_0808]

So today I decided to use Windows built-in VPN where you get the IP address, username and password from a certain website. You see, sometimes when I use the PPTP protocol it will randomly fail to connect for a day and goes back to normal in the next day. The error message is "A connection to the remote computer could not be established, so the port used for this connection was closed."Using L2TP VPN works but very slow for some reason. I've also tried reinstalling the drivers and disabling my proxy but to no avail.

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