Arrears in payment error - bank mistake

I paid up my revolving credit loan in March 2015 and the bank notified me that account is paid in full. On Friday 19/06/2015 I visited the Standard Bank branch in Woodbrige Square, Kempton Park and was helped by a consultant to re-open this account. I again took the R17 000 available to me. On Tuesday 23/06/2015 I was informed via sms that this account is in arrears - frankly impossible as I opened the account only 4 days earlier? I immediately phoned the number given in the sms only to find out that this is the collections department. This angered me as I have a very well managed account with Standard bank for more than 14 years. I have various accounts with Standard Bank and all accounts are managed impeccably. I have never been in arrears on ANY of my accounts!<br> <br> I lodged a complaint with their complaints department on 23/06/2015 with reference number *** and was promised that a complaints handler would contact me to resolve this problem. to date I have not had that call. On 23/06/2015 a person from collections phoned me (19h45) and informed me that the account is in arrears and needs to be paid. I am still waiting for a suitable reason as to why this is in arrears!