TERRIBLE BAD SUPPORT - KEEP AWAY FROM THIS COMPANY

I have sold my car more than a month ago and requested change of ownership so the new owners can take over payment, customer care does not answer, I had to select the option that my car was ****** to get a response, they sent a form but the completely WRONG FORM!!!!! Since then I get no response on calls, emails, in fact when going through to the option that my car was ****** they listened to me then just put the phone down. PLEASE can somebody call me, everytime I phone nobody answers, so I phone back and choose option 1 because that is the only time my call gets answered but they just put the phone down on me everytime. Is this is how you handle ****** cars? Put the phone down on the client? If this is the case then I am not going to let the new owners take over the tracker, I would not want them dealing with people who put the phone down in ones ear!!!!!!!!! I would rather totally cancel the entire thing because NOBODY CALLS ME BACK, NOBODY EMAILS ME BACK, NOBODY TAKES MY CALL!!!!!!!