I'm very upset

I went to capitec for an inquiry on 18/05/15 at around 13:00. My name is Basil Siviwe Nene I have an account with Capitec. Some ARVCompany (which I don't know) is deducting a sum of R89 from me without my knowledge. I asked the lady who was helping me to check where and why its deducting from me. She couldn't find it on computer but still she said she cannot (unable) to check when did it start deducting. On my three months bank statement it shows on all 3 months its been taking money from me. This woman just didn't care. I'm still sitting with the problem of not knowing this place and when it started *****ing my money. Pls help.