MTN are a bunch of *******

How can it be legal for them to change contract as they see fit?? My daughter has had this phone number and contract through me since she was 16 years old!!! It has ALWAYS been a top up contract with a SET LIMIT!!! <br> August and September goes way over the set limit!!! So I phone them on the 808 line, and the stupid idiot on the other end tells me this was never as top up contract!!! so I tell her in no uncertain terms she is talking nonsense, it has always been a top up contract, the *** says if I don't calm down she will drop the call !!! I told her I don't give a **** what she want they are *****ing from me!!!!!<br> So now they will make it a top up contract with a set limit!!! BUT I STILL HAVE TO PAY THE FRIKKING BILL!!! I AM SPITTING MAD!!! <br>