account debited instead of being credited

I bought a dress on sale on 1/06/15 R159,95 on my standard bank cheque card and it reflected immedietley that the money went to Edgars. I didn't like the dress so I returned it on the 15/06/15 and the cashier Khethiwe Thusi *** advised me amount will be credited within 3 days but immediately sms came through while i was exiting the store SMS READ: (STANDARD BANK: R159.95 PAID FROM ACC 8169 TO EDG WEST STR ***. ACL BAL R126.29 2012-06-15 QUERY? ***) but when i checked my bank account the money went into the account my balance went from -R33.66 to R126,29 but when withdrawing at the ATM it was declining and showing i owed -R193.61. I visited the bank was advised Edgars had billed me agin i now paid again for the dress. This is affecting my credit record badly now and i will be charged by the bank for the overdraft... I am really disappointed with this its an inconvinience for me. who is at fault here because the money went into the account i have an atm slip that showed money went in. THIS IS UNACCEPTABLE I'M GETTING A RUNAROUND NOW I DONT KNOW..... THE BANK IS POINTING FINGERS AT EDGARS AND EDGARS IS SAYING STD BANK! I'm cxling my bank account going to Nedbank