VODACOM CANCELLATION - WILL IT EVER END!!!!!!!!!!!!!!

I am so sick and tired of trying to cancel our contracts. I phoned end of Feb to cancel 2 contracts 1 that ended middle last year already an the other that ended this year. then that was that. no one said that I will have to pay at the end of March again because my cancelation was in the new billing cycle so I left it. then in the middle of March, I start getting calls from Vodacom that I am in arrears. Then I pay end of March again I fall in the new billing cycle which according to them start on the 25 of each month I ONLY GET PAID AT ON THE 1ST then they say they cant unlock my phone because I have not paid for the NEW billing cycle. I NOW HAVE TO PAY FOR 3 MONTHS JUST TO GET THIS DAMN THING CANCELLED. I AM NOT GOING TO PAY A SENT MORE AND WANT THIS CANCELLED.