Money sent twice

<p>Somewhere last month i did a cellphone deposit of 1900 to a capitec client from my Capitec acc, it showed that it was transferred and the person had not recieved, i checked my acc and the full balance was still on my account, therefore i deposited again. Recently when i deposit money to the account, it deduct every amount i deposit, so i call capitec and they informedme that my account is on negative because the amount was deposited twice and that it is my problem, but how is going to be my problem if my acc still showed that the amount was not transferred and when the client has also not recieved the amount, and from my exprience after transfeering the amount is immediately suppose to be deducted from the account and the acc is not suppose to still transfer if the amount is already transffered. That shows an error somewhere on the system.</p>