I OWE CELL C NOTHING.

im very ****ed off with cell c service... i app**** to a contract with them and i was told i'd be paying R400 FOR 24months which i agreed to but on the very 1st month i was debited over R2000 (open line, mind you i was not informed of such) which i reversed and i called and the matter was sorted out or so i thought. i was re-contructed and the new amount i had to now pay was R430 no problem right? i paid all these months and i missed 2payments which was my fault which i later rectified, i had to pay R1370..i went to a cell c store in campus square which the guy was very helpful, he called the legal department in which they said i should i pay r70 which i paid to my surprised i get calls from rude collectors (NDC collectors) saying i owe cell c what bull **** is that???!!!! I DONT HAVE A PROBLEM WITH PAYING but im done paying cell c so why am i still getting collection calls? it's annoying and mostly this is ruining my credit record.