No Transparency on Vodacom contracts

i have a cell phone contract with vodacom of which i have skipped payments for 3 months ( Feb- April 2020 ) upon my recovery in May when i paid in all the amount in arrears R446.00 inclusive of the charges. In June they did not deduct their agreed monthly premium of R99, that is when i called them and asked them to deduct their premium as per agreed on the contract , the consultant told me that i don't need to pay because the invoice is R00.00 , she said they will deduct the R99 the following month of July, Ok ! come 25th of July they debited R164.00 when i query this they tell me that they have issued me with airtime on the 5th of June and 1st of July, now i spoke to Daisy who says they deducted 2 times the amount of airtime and data , 1stly i did not sign up for data contract , 2ndly its not my fault that they did not want to debit in June , Daily even refused to escalate the query further she was even rude with no telephone etiquette the invoice it was for June which debited in July after they told me that my invoice for June is R00.00 suddenly i'm billed for June and July . No transparency at all, vodacom over deducted me and refuse to refund me.