Matrix Vehicle tracking

I cancelled my debit order with Matrix September 2019 as the Polo Tdi 1.9 was sold and no vehicle tracking was therefore needed any longer. EVERY person I speak to at the call centre promised to cancel the debit order. Two weeks ago after I again had a discussion with a call centre agent I received 7 emails of clients with contracts.Not one in my name, I spoke to David Mabuza on Saturday who promised to email the debit order cancellation to the relevant department and CC me. NO e-mail was received!!!! I request a refund from cancellation date to current This is the worst service I have ever come across!!! Matrix should contact NETSTAR because my debit order for another vehicle was cancelled the same day of notification,