Tracker is a ****

Absolutely horrid, ****mers. I phoned tracker earlier this year when I sold my car asking for a cancellation. 6 months later I keep receiving invoices from them. Eventually I contact their customer "care" asking why I'm still being invoiced. Conveniently, they have no record of the call I made and unless I can provide them with the exact date they can't help me. I provide them with the phone number and almost 2 weeks pass before I have to send a follow up mail just to get a response. I then receive an email and SMS telling me that they tried to call me multiple times but couldn't get through. There's no record of their call, not even under blocked calls on truecaller. I eventually got bul**** into settling my account for a car I haven't owned in 6 months. Still awaiting cancellation now, but I'm genuinely disgusted by this company. I never complain but this is borderline ********.