Payments went wrong with standard bank, when paying my rcs makro account

I am very disappointed with the service of standard bank internet banking, for the first time ever I decide to do an internet transfer from my personal account into paying my makro rcs card. I punched in the account number and everything else, it read payment was unsuccessful due to this account being a beneficiary, I never transfered money before into the account of makro before, so I though maybe the beneficiary is makro account card I go to options and I selected this account but no account number was displayed. So I transferred payment of R500 into the makro account card. Now payment went wrong, cause it suppose to be Makro rcs account. Now my R500 is gone to another account of makro and standard bank wants me to pay R300 to recall amount of R500 and its not guaranteed.

R500 is a lot of money for me and I'm really angry, makro cannot help me either wasted 3 hours trying to get through correct department.

Standard banks to blame cause initially the details where all correct before, it read that rcs/makro is their beneficiary.