Don't Care attitude

I took a contract with autopage and was activated in November 2015. we both agreed that they should debit me every the 25th of the month. Come December my they did not debit my account. i went to the shop to check for my invoice. the lady who was helping me by the name of Gee could not find my invoice s it was not reflecting on the system. all of sudden on the 19th of January 2016 my account was debited, due to lack funds in my account and i was not expecting any debit order to go through my account was left with a negative account due to reversal charges. I called autopage and the call centre agent told me if I don't make a payment they will close the line and she was not polite at all. I made sure I made manual payment R721.52. Then again in January they tried to make a another debit of R721.52 which I don't understand why. I went to autopage for clarity the lady that works there also doesn't understand why. If I knew autopge works as a third party to Vodacom I was not going to take a contract with them, I was going to go straight to Vodacom. My phone has a parental control activated and I am trying to remove it. I called Vodacom to assist me and they told me I should call autopa