Over charging me for things I do not know

Tried calling an agent to resolve a issue. And she rudely put the phone down in my ear. I get this message and my contract I agreed on is for 199. And I also want to cancel my upgrade now. I'm not happy work cellc and would like to move all my things to another network..

Your Monthly Bill Limit for ***, which includes your Subscription & Value Added Services, is R 390.00. You have R 191.00 Available Spend remaining to use. Your ability to make local & international calls or use international roaming services will be disabled once your limit has been exceeded. You can manage your bill limit by logging onto the portal on www.cellc.co.za or on Mobile App. Cell C