Telkom fibre

I have a 12 month fibre line installed and my contract is almost at 2 years... I called Telkom to see if they can offer me a better price as they have the same line that I do advertised on their website at a much cheaper rate.... To my surprise Telkom refuses to do so with out canceling my fiber line first... The only option they giving me is to take a more expensive line... This service totally restricts consumers from being able to move freely or to be loyal to Telkom... So because of this restrictions and not being able to help me in this regard... I am a customer that they will lose...