Telkom Mobile upgrade

I visited the Port Elizabeth store on Saturday to upgrade my contract just to learn that none of the phones on the website are available in store and they are not willing to source me the phone of my choice. I enquired via the chat to an agent service if I can upgrade online to which the answer was no but call ***. I have been calling all morning and I am getting no joy. The line just rings. I am disappointed by the service I am receiving.