Pay R1500 - because I say so or else - if I had a choice - i would never use them again!

I have emailed and called to inform them I want to move my line to a different apartment. I asked on initiation when I took out my contract if I could move it when required - they said sure no issue. So when i'm trying to move my line. They stating I need to cancel current contract - pay for the remainder of the month i.e. another 3 weeks, start a new line which I will pay pro-rata for the month which works out to another 2 weeks and pay a R750 connection fee on top of that. All in all - I will effectively pay an extra R1500 for MAHALA. So I phoned 3 different departments spending 1 hour of my life and all the while losing hair on my head due complete disregard for client customer service - nobody wanted to help in any way. From Nasreen Landsman who was the manager who argued with me and told me pay it or we wont connect - saying I must phone accounts myself to Opel who effectively told me I have to pay for the whole month as that's how it goes as I cancelled - even after I said I want to move it - you forcing me to cancel. BTW this is long after I emailed about 10 times and phoned a few times and asked them to call me so I could have some human connection to explain it all - in the hope that a human being would have more sense - seems like I should have stuck with tech - i.e. emails as it has more brains than the cool ideas bunch.