wage query

my daughter works for spar @ parkrand, early march she had a customer buying electricity to the value of R1000 few minutes later customer refunded that electricity and team leader authorised that return, she was told she has a shortage of R1000 and the customer's that was serviced by her told me she returned that electricity and she never used it, so what i dont understand is that how spar works we as customers buy and returnes and their cashier carry that shortages? i knew this because she cries everyday about it and i am a concerned parent just needs some answers of why she should get a R1000 deductions from her wage? and i tried to call customer service still cant get hold of Alesta<br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br> <br>