Upgraded but not informed

I requested an upgrade from 4 Mbps to 10 Mbps on 22 November 2017 to be effective from 1 December 2017. I was informed that it would take 5-10 working days.

On 1 December at 9:00am I called Telkom to enquire whether the ADSL was been upgraded and the technician confirmed it was upgraded. He sent me the login details for the router which I used.

Telkom has sent me an invoice which is much more than the monthly charge I agreed to. I Telkom on 11 December and was informed the service was upgraded to 10 Mbps. Telkom did not inform me of this and has no right to charge me for the period I was no aware the service was available to me.

I only received the login details on 1 December when I asked for them therefore Telkom should reverse the charges between 22 November and 31 November due to failure to communicate with me. I will not pay for a service I did not receive.