Call Centre ethics

I just received a call from Cell C and to be honest when I hear the name Cell C it already gets my blood boiling. The call centre agent phoned to inform me that because I am no longer on a 2 year contract, but now month to month, I would be paying R 149 per GB instead of R 199 for 20 GB. When I asked when this will happen I was informed that they cannot see/say. I requested that everything should be put in writing to me, so that I can keep a record. They refused and said that the call is recorded. I then told the agent that as per the consumer protection act they are supposed to inform the client that the call is recorded at the beginning of the call and not the end. I have had such intermittent service for my data line from Cell C that I believe if I should sign up for another 2 years, they will be ripping me off.<br> <br> I do not understand why they want to change my contract amount. I do not understand why this communication cannot happen over e-mail / sms etc. I do not understand why a call centre agent would talk over me and not provide me with the necessary data.