THESE PEOPLE ARE RIPPING ME OFF AND *******LY TAKING MY MONEY

I was previously banking with standard bank over 10 years ago and I had a current account which then went into arrears due to failed debit orders.after years of leaving standard bank I get a notification from my employer telling me that im being garnished by starndard bank an amount of R400 which I thought would be for a month or two or so to make up for the negative balance I left unpaid.to my surprise a company by the name of Saya Recoveries has been garnishing me since March 2015 until December when I changed my job,they then have the ordesity to call me to tell me they will be continuing with the garnish. to date they have deducted over R8800 from my account and they still tell me I owe R6800. I am still awaiting my statement and they cant explain how unpaid debit orders of less than R500 can get to such an amount and as per my knowledge debt over 5 years is written off.i am tired of this company harassing me and calling me daily and threating to garnish me further. how do they explain all the money they took from me and how can a mere cheque account end up with over R15000 legal fees.they tell me they got a court order to garnish me but how come this was never even communicated with me prior to the actual proceeding. hell will freeze of before this **** of a company together with standard bank take a cent from me again.