Poor telephone Service and No authority to supply me with mail to my home address

Received a mail in the postage from Ackermans with the option to apply for an account. Apart from the fact that my surname is incorrect ( I got married 3 years ago) I contacted them on the number supp**** ***to opt out of receiving future mail from them, there is first off no option for this on the help line, held on for an agent who was rude, didnt understand me and my call was dropped. Phoned again to speak to the manager and was again speaking to someone who was rude. I also inquired where did Ackermans get my details and who gave them permission to send mail to an address that is not registered as a mail address? To which the answer was vague, woman said it was from my bank but my bank is registered on my new surname and a PO Box. I do not want to receive mails to my home address and I want specific details on who is giving out my personal information!