ABSA Billing Service Fees on Dormant Account

I unfortunately had bank accounts with this bank for many years until 2010. After having enough of bad service I closed all accounts and moved to FNB. As far as I was concerned all accounts were closed and we moved on. Up 2 weeks ago when I started getting sms's from Absa telling me that my account is 3 months in arrears. I called the legal department and they could not help, they requested help from their admin dept. I insisted on the statements since 2010, since I had not received any since. Turns out from mid 2010 to mid 2013 the account was not used and dormant. Then from mid 2013 Absa started charging a service fee with interest and it has now escalated to the limit on the account. Now they want to bully me into paying it. Is Absa so desperate for business that they will go to ********* means to get it??? Why have I not heard anything from Absa from 2010 up to now?? In principle I don't do business with Absa, I never will in this lifetime going forward. Can someone from Absa please look at this matter URGENTLY as you are adversely affecting my credit record!?