Billing of account

I am very upset with Vodacom I did not have the greatest experience from the word go ,first things 1st I went to the shop at the heidelberg mall to buy the phone that's where all this problems started as the consultant that was helping me did the 1st application wrong now it looks like I took another phone and now month end January I was debited more which is R599,43 instead of R354 and some cents ,I called the store and I was promised a call back as she was still busy with another client still today I am still waiting for that call then I called the call center as when they debited me more I did not have that much and my bank charged me R100 penalty in my cheque account so the call center logged a cal for me for my acc ref:1- ********** ********** then I called today to find out if the query has been sorted out then the 1st consultant who assisted @4-45 told me that my query is resolved and my account credited and she will send me the details which I am still waiting for and told me I must pay R354.. Then I called the 2nd time around the consultant tells me I must pay 6something for what she tells me its what is on the statement even after I was credited ,what I want to know are they not using the same system kanti anywho please fix my Acc and accounts contact me on the 066 number they have it on the system as being a customer for a month on Vodacom is just pain in my life .