System does not update Debit Order details

I logged on to your system to update my debit order details on 1 September 2015. After completing the OTP, the change was successfully logged and your web site informed me that an request has been submitted for my details to be changed. NOTHING was done. As a result you debited the WRONG account this month.<br> <br> Every singe organisation I dealt with has billed me correctly and updated my bank details correctly. The only organisation that CONSISTENTLY messes up both the product they offer and the administration thereof is NETSTAR. Absolutely pathetic! You are so unreliable that I have opted to instruct my insurer to ignore the presence of the Netstar unit in my vehicle as I do not believe it will work when required.<br> <br> Please fix your billing details IMMEDIATELY and confirm in writing when this has been done.