The right hand does not know what the left hand is up to !!!!

Towards the end of May 2018, received a call from MultiChoice, advising me that my monthly subscription would be amended, effective 1 June 2018, from R984-00 to R879-00. From my bank statement, the amount of R984-00 was deducted on 1 June 2018, which is contrary to the recorded message from MultiChoice - what recourse does the customer have ???