POOR SERVICE FROM TRACKER CALL CENTER

I sold my Mercedes during February 2022 and cancelled my Tracker account during March 2022 when activating my wife's Tracker account on her new vehicle using their call center. I send Tracker an email on 17 March 2022 cancelling my Tracker account. Tracker sent me a reply with "Your work item number is 119 504 34". On 4 May 2022, I queried the debit for April and was sent another work item number 121 663 59. I received another Invoice for May on 12 May which I queried. They rep**** that the vehicle was still active. Work item number 122 400 77. I received a further invoice on 17 May which I queried and given another work item number 122 601 88. A second work item number was also issued on 7 May, 122 601 89. I received a further invoice on 19 May. On 20 May, I was informed via email that work item 122 400 77 was cancelled - duplicate lead received. On 26 May, I was informed via email that work item 122 601 88 was cancelled - duplicate lead received. Tracker debited my account today 26 May for a service I cancelled via their call center in March 2022 and followed up with an email on 17 March 2022 (see work item number 119 504 34) and a number of emails in May. Weren't call centers and emails meant to make life easier and quicker? My experience with Tracker Connect leads me to think otherwise. Regards, I Pulker