KPN is cancelling 2 of my contracts too late

I sent termination request with required documentation because I left the country on January 31. KPN cancelled my first line, but left the other 2. I’ve been calling and emailing for months now specifying that ALL my lines should have been cancelled.

I was finally recently told to send an email PER LINE for some reason. I received an email yesterday that my lines will be cancelled on April 11, but I had already sent proof I left on January 31, and I am still being charged. 

I have been out of Netherlands now for several months and no longer able to continue to calling the Netherland as there are long distance charges. Also, I almost never get responses to my emails.

Could someone please help with my account and refund the charges that keep occurring past my cancellation date?