Vodacom poor service overcharging me

<p>I contact vodacom informing them in advanced more than 14 days to change my direct debit date,they did not,this happen in June and July where the bank charged me R250.00 * 2 months banks rejection fee,total amount R500.00 and then I advice the agents to put me to my original plan 2Gigs top up data ,this mean that vodacom charged me extra R150.00 *2 months .that an therer R300.00 ,this mean vodacom owes me R800.00 in total,I also informed them that the charging cable is not brand new they given me second hand,it's blackish ink on the white cable,the agent are so rude,they should have replaced the charging cable also when,</p>