processing deal that wasn't agreed apon

After 20 minutes of wasted time on what I thought would be a 2 gig addition to my contract fcor a lower rate get told that it is a portable WiFi. I then proceed to say that I do not want the deal as I have had one before and it did not work. Today (23/06/2015) I get called to reception for a delivery of the portable WiFi unit that I said I didn't want. So I call them back to be told that the deal was accepted. So again telling them I do not want it the consultant tells me that she has processed the cancellation but please can I call back AGAIN on Friday to confirm that it has been cancelled. Is it because they are there largest service provider in the country that their service in in such a poor state. I have been onto their Facebook page as well and there is nothing but complaints. I think it's time we stood up as the public who pay these massive contract fees and demand and fight for a level of service that meets our needs.