Privacy violated and incompetence

If I could rate -10 I would. Netstar have sent my travel log twice to the previous owner of my vehicle thereby providing my confidential information to others without my permission. I have been querying this telephonically and by mail since 03/11/2025. I only had the unit fitted 27/11/2025. I then had my battery replaced and received no notification from Netstar and added this to my query (which still no answer on). Yesterday I noticed I was double deducted from my account. I called again (for the 7th time) and queried this. I was told that I had insufficient funds the beginning of November and my payment was returned and therefore the double deduction. I sent my bank statement showing a deduction and no return on my account. I have just received a mail that the account is UpToDate, without reflecting the November payment and showing only the double deduction. I have tried to cancel but am told I will need to pay hefty penalties!!!!