ABSA ATLANTIC email account

I received a call from the Attorney handling ABSA Atlantic overdue accounts to inform me that I have been handed over due to non payment of my ABSA Atlantic email account. Apparently this is a compulsory service implemented by ABSA since 2013 and I all of a sudden owe them money for the service. I have not heard of ABSA Atlantic email service until I received the call, saying that I have been handed over due to non payment. I never signed up or requested this service and I refuse to pay for something which the bank decided I need and charged me for. As a consumer I also have the right to select the service which I need. No service provider has the right to decide on my behalf what service I need and just start charging me for it. Surely this is against the law?! After 13 years, I will move my account to another bank who does not operate outside the law and actually have the client's interest at heart, instead of *****ing from the client by charging for unauthorized services!