Standard Bank incompetence

This is an ongoing issue that Standard Bank promised to fix and this is the last chance before I take this to the Sunday Times. I do not have a Standard Bank account but someone else has my cell number linked to their account so I keep getting automated phone calls about accounts in arrears. The previous owner of my cell phone number must have been at least five years ago and I have already on numerous occasions asked that this be sorted out. This is the last chance