Useless Call Centre Agent is such a ***** and you people are robbibg

So I call in and a lady assists sooo helpful but our pone cut off before we were through and she hadn't been able to finish. I call back get through to a ****ing dumb woman who says she goes by one name and she is the only one in their floor that has that name (Cape Town Customer Care Centre) Nosomething is her name. Sooo unwilling to assist such an absolute *****!! My issue is that I paid R149 on my account,, amount to purchase for was R141 I went to exchange an item worth R110 for an item that costs R199 but had a R50 voucher so all in all I used R39 right!! So do the ****en math. From my "you may still buy for"" R102 on Friday today its R91 how I have not bought a thing since Friday and what do you sell that is sooo cheap?? My account balance R458.21 amount due is R92.58 how the actual ****?? Even if its just R11 that disappeared what if its R5000 clients with R11 missing then what??