Transaction Reversal

On Saturday the 14th of March 2015 I made a purchase of R339.40 from a supplier. <br> The cashier accidentally punched in the amount of R3339.40 into the card machine.<br> <br> I contacted my personal banker Monday 16 March 2015. I filled out the necessary documentation and 25 March 2015 received a e-mail (service request ***) that the reversal will be resolved on 15 May 2015 (which is already 2 months later!!).<br> <br> Today is the 12th of June 2015 (3 months later) and no response and no transaction reversal??????