Mondo Data Sim

I got called by a Mondo agent who was very efficient when selling me a 10gb data contract which came in a form of a sim card. I did not want to use the sim but instead have them to make it possible for me to use my existing Telkom prepaid number and get it linked to to my new data. An agent by the name of Sihle said it is going to be possible to do that at an extra R8.00 monthly which means my voice line is going to be ported to be a Top Up. I was told on the 24th that it is going to take 3 working days but to date it is still not active. I called in today and spoke to a rude Somila who didn't know what she was doing and kept on repeating what I already called for. She was supposed to put me through to her senior but kept me hanging for more than 20min. I would like to cancel this nonsense of a contract A.S.A.P. I hope there won't be any debit going through my account since I have waited for half of the month for the stupid sim to be activated.