Legal fees

I lost the job while I owed my account. They referred the account to MBD attorneys and they called me. I said to MBD, when I get the job I will pay Woolworths but I will not use your banking details to pay I'll go to the store. Indeed I paid my account in full and paid 614.00 rands extra purposely. When I went to the shop to use that extra money. I was told that, the money will pay legal fees. I contacted customer services several times through emails and I got the same answer, that they will use my money for legal fees. My argument was, you appointed MBD,not me so,I'm not liable for the legal fees. I refer the matter to credit ombudsman and I got refunded.