Time wasting Tracker call centre

Tracker call centre is the worst call centre to phone to solve issues at this moment holding for 20 min as it seem the lady assisting cant not help me, I have changed my bank details in July 2017 on the website, received confirmation email from tracker, yet they did not take any premiums of my new bank account, phone them paid the money, ask them to open account, told me it will take 7 days (which I am paying for) when insisting to put me through to a manager, i was asked to hold the line for almost 20 min, problem solved, account opened again, but requesting them to make sure the debit the correct account as from end Feb (which of I changed in July and received confirmation) the lady request me to do it again and to provide bank details, I am on my cellphone not having my banking details with me, my question: do your own system fail on you? why not going onto my profile and see all changed made, why do I need to do it again? you mos send me confirmation that it is done, which I trust will be correct then, so why my I check if you do your job and see i you taking you monthly instalment of my account? After almost 45 min call and they expect me to stay calm. This is not my 1st bad experience with tracker. I am looking forward to cancel my contract with them.