Shockingly Bad Service

I have moved to Cartack from July 2024 - and now in Jan 2025 was told to pay a rather hefty fee to De register and re-register in new vehicle. I arranged this after being on call for over 20 min - booking was then done for 10.01 at 8am. After enquiry at 12pm on 10.01 it was noted that de register wasn't done. This after email, SMS confirmation including confirmed booking reference confirming date and time. I then spent a further 30 min calls back and forth to try and distinguish what is going on as this needed to be done. I was told by Leboghile that they will chat to me after 6 clients before me. Should this not be addressed i will cancel my contract and NOT pay cancellation as if i cant get asssistance and trust confirmation thereof - i cant trust tracking service.