Vodacom contract which debits more than agreed upon from 200 to 438

I have requested hellopeter last week to help with my query , which i currently have with vodacom , It was about the amount of debit order of 438 which i was not made aware off, As had agreed to pay 200 , and since have lodge a complaint vodacom has not called me on how to resolve the issue as a not willing to pay 438 , I do not afford 438 for fone ,as i am a single parent . Please i edge you to assist with all that you can do , I keep on getting messages that 438 has to be paid A thought was seeking help from hellopeter the issue will be resoled , but still have hope that you guys will help me.