Wrong information given by Agents

I called Telkom to change my banking details banking details has been changed successfully and I was told the new banking details will only kick in end of Jan 2016 I can go make a manual payment. The manual payment of R738 was made on the 23th and notification has been send to ***. za. I called on sunday the 27th I spoke to Miriska who advised me the payment is reflecting this morning the debit order goes off from the new banking details.I called telkom no agent is able to assist I request to speak to the team leader or manager they are never available mbalinhle Ntidi said her team leader Thembilehle Phungula will give me a call back I'm still waiting haven't receive any call back this is service is unacceptable