Breach of contract

I have been to the vodacom shop @ N1 City, 5 times & not once was I assisted by the same person, since 15 March & still they are not able to correct the problem!! <br> I have 2 contracts & went in to cancel 1 to change it to pay as you go - with a sim swop. This is where the problem started as they cancelled the wrong contract. I now don't have access to the Internet & monthly minutes/ sms' s that I require. ..& am still being charged - the staff at the store are inept & inefficient to fix the problem & expect me to cancel my contract & pay the fees required... after them telling me that it was their staff member who made a mistake & has since left the employ due to pregnancy. I would appreciate assistance to correct this problem of poor service & training. As it truly reflects badly on such a large concern. Thank you in advance. .. Arthur Hendrikse .