Standard Bank Not Assisting Their Clients Correctl

I made a payment arrangement on my Standard Bank Credit Card with the acting attorneys on behalf of Standard Bank early in March DMC. My debit order was suppose to go off on 26 Mar 15, by 27 Mar 15 I phoned DMC concerned that they did not debit as arranged in early March 15, till date they did not get back to me & when I phoned today 31 March 2015 DMC again, they also cant assist me further as the account is Withdrawn....Furthermore Standard Bank self does not allow / assist me with this query, Standard Bank does not even want to further assist by making a new payment arrangement on this account. Standard Bank claims I'm the client are at fault, How is this possible?????