forced to stay as I WANT TO PORT OUT

I am trying to port my prepaid number out of Telkom to a different provider and they are making it hell reason why I want to leave the provider, their incompetency, I have spoken to a couple of advisor who failed to assist with lifting the block that they placed on my number, its like I'm forced to stay with them I've been asking to be put through to the port or a manager who can assist with lifting the hold but as per usual there is an excuse of why you cannot be assisted 1 was that department doesn't exists 2 there is no manager that's available, spoke to a lady who is apparently the manager who told me I will not be able to port out because there is an outstanding amount on a different number which brings me to a question of what does this prepaid number got to do with contract related issues? I feel its my right to be with any provider I wish to be with I cannot be forced to stay with a provider that constantly has issues and that forever fails to deliver on service. I want the hold to be released asap so that I can jump ship from this misery.