Unacceptable Service Vodacom

I upgraded on my Vodacom Contract during June and was told that I would pay R1297 fixed for my 3 Vodacom contracts all together. Only to find that I had to pay R1621 in July, R1910 in August, R1608 in September and worst of all R2032 in October. I picked up on the 01 August that something was not right and contacted Vodacom to report it. Vodacom informed me that they made a mistake when I upgraded and accidentally changed my line to an open line. I immediately request a refund and also for Vodacom to change my contract back to a TopUp contract as I never approved an open line contract! I checked my bank statement this morning and saw that they once again did not stick to their promise to cancel my open line contract. I decided to contact Vodacom again and was told by Nobubele that Vodacom never cancelled the open line and when I requested for an immediate refund as I have also other commitments to cover monthly I was told that I had to wait 7-14 working days then only will they refund to my Vodacom account first after this the money will be refunded to my account. I find this absolutely absurd! If my money is not refunded during this week still I will personally take my Vodacom devices to my nearest Vodacom shop and demand an immediate cancellation of all my contracts!!!!!