Frustrating waste of time!

Have been trying to get personal details amended on Momentum Wealth contract for almost two years. Was unable to log in online as username and password were not accepted and couldn't be retrieved online as Momentum staff had failed to carry out repeated instructions to amend cellphone number and email address. After fulfilling every request for documentation and copies of documentation and proof of this and proof of that, plus many phone calls and emails, finally today, I was able to log in - only to find that CONTACT DETAILS ARE STILL INCORRECT and username reminders, will STILL BE SENT TO WRONG CELLPHONE AND EMAIL ADDRESS!!!!! They are still using the old email address despite being told it hasn't been used in 10-15 years! One of the reasons it was changed was that someone else had the same (or very similar) address and was receiving my bank statements! <br> <br> I have also asked several times to have the user name changed but no-one has come back to me regarding that.<br> <br> Is there anybody at Momentum who has the authority/capability of carrying out a simple instruction? After almost two years of trying to get this done, I am having serious doubts! <br>