DONT GET A CELL C CONTACT

I am so frustrated with Cell c and there contacts never taking again a contact with them.i always have a cancelation issue with them. I cancel my 200GB LTE sim only for R799 a month in the begging of September .October was the last debit order they changed me almost R900 not sure for what but ok I left it think it's over now. Than I had a look on my cell c app saw there was 200GB again thing why is this here and the data is still working but the one balance is on R0 and think ok this must be the last data they giving me I used 20GB and checked 5 days later to see a bill of R1500 that i now owe Cell c . So now they changing me double and the data was supposed to stop and the sims canceled. I am sorry to say this but this ppl are *****'s and quick to get you into a contract but you will struggle to get out of one never again cell c never again