Capitec-Please return my R340

Dear Sir/Madam, I like Capitec Bank and am usually happy with it. Unfortunately when doing an EFT I put the branch code where the account number should have been. The beneficiary told me they had not received the funds and pointed out my error. I tried to rectify this in the local Longbeach Mall, Noordhoek, Cape Town branch. I was told on a R340 EFT I had to pay R150 to have it investigated. I was told if you don't have it investigated, the money might return to you if the account number does not exist. I suggested Capitec is effectively *****ing my money. I was told, Capitec is not *****ing your money because it's your fault you made a mistake. Surely I am not the only one who has made a mistake. I would really like my R340 back. Would Capitec please oblige? Please let me know. Thank you.