Inaccurate billing on my account

On 2015/06/09 received a call from Tshego Monageng explaining to me that my contract with autopage is about to expire would i like an upgrade, i refused to upgrade & she asked me if would like continuation on the airtime only for :<br> Proposed package is<br> *** Package is MTN Anytime 100 for 82.00 a month ( benefits is you will be getting R100.00 worth of calls + 25 sms's)<br> *** Package is MTN Anytime 100 for 82.00 a month ( benefits is you will be getting R100.00 worth of calls + 25 sms's) i agreed to the above terms. July an amount of R300.18 was debited & i contacted autopage but they told me it was an agreement i have with them i disputed thought everthing was sorted.<br> On August R306.00 was debited thought it was a mistake again from them.Then on September i saw that R640.74 is to be debited, i called autopage requested a reversal because my billings are going up every month which is not what i agreed on with the above lady.<br> Then on 2015/10/05@ about 15:20 was called by a gentlemen from autopage telling me that my services will be suspended till i pay,now my SIM cards are blocked but my contract is for airtime only, they must honor our agreement stop this nonsense.<br>