Capitec still hasn't refunded me my money!

It's been over a month since Capitec decided to debit my account unprovoked. One the 1st of March someone sent me money. I'm the 3rd of March that exact amount was debited by Capitec. I've called over 3 times to their call center and every single time, a team leader is meant to get back to get. That has never happened. I dont have time to go into a branch because of my job. But it really buffles me that Capitec can do this, then when I bring it to their attention I don't get any assistance!