Non-existant customer service

I traded in my previous vehicle on a new vehicle. My previous vehicle was factory fitted with a Netstar Sleuth tracking device.<br> I sent Altech Netstar an email on 26th January 2015 quoting my account number and requesting them to cancel/close my account. I was then copied in a response From Sarah-Anne Wasmuth who had forwarded my request to cancellations.<br> No response from Cancellations was forthcoming.<br> On Wednesday 4th February 2015, I once again sent an email to Customer Service to enquire why a deduction was made from my business account, as I had already requested them to cancel/close my account.<br> To date, no response has been forthcoming!