Telenor Norway

Basically I have been a customer for couple of years until they started rigging my payments 2ce as high and even cancelled the prices for suscribtion that I have been using. So I switched to cheaper alternative, but then I had to contact then again to get a paper for my residency permit that I have been customer from year x to year x. I called first time and explained what I needed asap, however 2 weeks later I get previous year invoice copy. So i call again, wait 2 weeks get a paper stating that by law they can't disclose my calls content. So I call again to find out wtf they are doing and why they waste my time with sending me nonsense, I haven't heard from them since. Each time I called they charged me as if I was in other country on my phone and I never even got help, such a rip off. In comparison it took a bank less than a work day to send me a confirmation that I am a customer there. Their behaviour is insulting tbh, they did wrong and just never got back to me at all.