I hate Telkom right now!!!

I had a cellphone contract with Telkom which came to an end in Feb. I called the call centre because they sent me a bill for over R800 which I needed clarity on. I spoke to a guy named Muzi who explained theres been add ons of data etc that ive been charged for....which I didn't agree to. According to my knowledge, if your contract ends that's it. So I asked Muzi if he can get someone to cancel my contract for me....he said to me I must wait on line and then I get a notification saying that my account has been locked!!!!! REALLY???? I cant even use my phone to even call the customer care now!!!*** IS GOING ON?? CHARGING ME FOR DATA AND THEN LOCKING MY ACCOUNT?? AM I NOT ENTITLED TO USE MY PHONE SINCE YOUR CHARGING ME FOR THE DATA?AM I NOT ENTITLED TO BUY MY OWN DATA AND NOT HAVE A CONTRACT????? WHAT THE HELL IS GOING ON??? MUZI...YOU ARE INCOMPETANT!!!!I NEED SOMEONE CONTACTING ME NOW!!!!!! MY WORK NUMBER IS *** .....il be in till 3...my home number is *** - after 5pm...I expect a call now.....this certainly doesn't fall under fit and proper requirments!!! Extremely frustrated. Waiting 30 minutes already to speak to someone through my work phone!!!!!!