Unhappy Client

I sent R80 e-wallet on 23 December 2022 and was able to withdraw R50. I sent a request to retrieve the R30 that wasn't withdrawn and I was told I need to pay R65 for that reversal. Bare in mind i sent tge the ewallet to myself and I don't understand why must i pay for the reversal whereas I was unable to withdraw the full amount. I insist I get my R30 because it wasn't my fault I couldn't withdraw the full amount from FNB ATM.