Extremely disappointed customer

I placed an order (SO181 ********** 03) for Fibre with Vodacom. As the infrastructure has not been completed I was offered the interm LTE 100gig promotion for those who is still awaiting fibre instalation. My Order was approved on Wednesday 17th October. On Thursday 18th October I received delivery. Upon inspection I found that Vodacom had sent the Fibre router instead of the LTE one as was agreed. I called the Vodacom Customer service Centre twice on Thursday and the agreed the the wrong router was sent and agreed to arrange for a swap out with the correct one. I called again on Friday and all I could be told was that the back office are attending to it. The call Centre agents were not able to update me on any progress or by when I could be expecting delivery. It was also not possible to speak to anyone who could assist as this was already escalated to the back office. I was basically told to wait for a courier to make contact. To date I'm yet to receive any feedback or update. This has been a very disappointing experience thus far.