Dissatisfied customer

I went to Telkom at Mall@Carnival, they did not have stock of routers for the Uncapped LTE deal. They suggested that I go to Telkom at Lakeside mall. I drove all the way there and received a very poor service from Linda Lukhele. Firstly, he sold me a 2TB LTE sim for R699p/m instead of the Uncapped/Unlimited 20mbps LTE sim for R599p/m that I requested. I need the uncapped LTE sim so that I can work from home. My company policy for the work from home benefit is to have a Uncapped internet connection with a minimum speed of 10mbps that is on my name. I had to call retentions to try to cancel the contract. They offered to change it to the uncapped that I wanted from the start. Now this has caused a delay and because of this, I will only receive the uncapped LTE invoice in August. Meaning that I will have to drive to the office for the whole of July and also pay for the 2TB LTE deal that I did not request, which costs more than the Uncapped LTE. I am very disappointed with the service that I have received. Not only has it cost me money and time, but it has ruined my mood and this is affecting my personal life at home. I am actually considering canceling all of my contracts with Telkom and going to another service provider