No response on unauthorised debit disputes

At the beginning of February 2016, I emailed FNB requesting a reference number as well as a debit order dispute form because my account was once again debited by some company I have never heard of on 01 February 2016 for the amount of R99. I did get a response stating that they have forwarded my request to their Premier Suite Department on 04 February 2016 and have since heard nothing.<br> <br> I have also have had zero feedback with my last debit order dispute (Reference 836009) which was emailed to [Email Removed] on 06 January 2016.<br> <br> Is it time to start thinking about changing banks? FNB, how can you help me???