Disgraceful Service

I have been trying to change the contract details of my Netstar tracker over to the new owner for the last year. After countless emails with new bank details, instructions and permission to change the debit order details, I am STILL be debited and have now been handed over. I keep getting passed on from person to person and I have only ever received one email in response to this which also passed me over to someone else. I think it is shameful how Netstar cannot keep track of requests on email or offer ACTUAL assistance with queries but are quick to respond and hand you over without even a call to find out what the problem is with your account.