overcharged in error by vodacom resulting in failed debit order

Hi

i upgraded my contract on 26 June 2017, the transaction was done online therefore it would result in no admin fees being charged to my account. i was also not informed that i would have to pay for the existing handset till the end of 24months. my contract is for R350 a month which is what i allocated for in my bank account however my account was debited for R608. R350 for the new contract R96 for the existing contract and R150 admin fees. you boldly advertise on your website that this admin fee will not be charged if i upgrade online, which i did now i have a failed debit order which my bank is charging me for because Vodacom "mistakenly " overcharged me and now i must wait for you to investigate which is ridiculous because your customer services acknowledges that the fault was on your side and not mine.

my reference is 1- ********** ********** . i have never missed my payments since i have been with vodacom and this is no fault of mine i need this rectified immediately and i need to be reimbursed for bank charges incurred due to Vodacom incorrectly over charging me