Poor Sales Agents Service

i have app**** for a mobile laptop deal online and was called back by an agent on 29 June 2018. we completed the application and was advised a debit order will be done on 1 June 2018. She (Kimberley) also advised that the delivery will take up to a week after the debit order takes place. I phoned twice a week after the debit to inquire about the delivery but the systems was offline and could not be assisted by the agent. i then called another week after thinking that the might me something wrong with y details. The sales agent tells me that she cant assist me and she will leave a note on the system that another sales agent from the sales department will phone me (do note she is from the sales department,literally lying in my face). i decided to call again on Monday 18 June as this waiting is getting ridiculous as Telkom has my R659 but i sit with nothing. The agent i spoke to advised that Kimberley knew from the get go that there wasn't stock but still continued with the transaction. Vuyo (another sales agent) saw on the system 2 days later that there isn't stock and cancelled the deal. None of these agents contacted me to let me know of this(very Poor service). So I requested that my Debit order be reversed and that i want to cancel the deal and speak to a supervisor to lodge my complaint. i was put on hold and the line went dead. No call back. I phoned in again today was put on hold and no one phoned me back. This is the worse service ever! I get **** to and put on hold with no service from the agent and Telkom has money that doesn't belong to them. Please assist me ASAP!