Terrible service

I originally took a LTE contract but a month later responded to an add for fibre with Vodacom. I only accepted because I was told that once everything was done with the fibre they will then cancel the LTE contract. I have been calling the 0860 number endlessly since then but never got any help. I was just get pushed from one person to the next with false promises. I am being billed for both the LTE and FIBRE since last year September ,can you believe that!!! This is absolutely unexcepable for such a huge company to rob innocent hard working people like that. I want Urgent assistance regarding this or I will take this further!!!