***** department not doing proper investigation

Very scary ***** department. I logged a ***** case for an unknown deduction on a friday. Unpon my own investigation i released that it was an old subscription. The company refunded me the money in five day. The monday after it was reported i called in and asked to closed the case deu to it not being *****. I got my money refunded by the company. 1 week after reporting i got another refund with the reference *****. I called and complained that the case was suppose to be closed why did they refund me. I even emailed. Haven't received any communication back for this. Until today i logged in and saw that i was refunded AGAIN with the same amount, so i received that money back once from the company that took it and twice from standardbank. Can we realy trust this department to handel a case if they give away money like its nothing. Normal people will keep quite but im afraid to have another case in the future if i see that my communication during the investigation was probably not even read by that department