No feedback or refund

On 29 Feb 2016 (conveniently over a weekend) received notification from Securitas of transfer to ADT. I responded to their communication by cancelling my account as of 1 March. I provided one month notice as per contract. After numerous phone calls and follow up emails I eventually received only VERBAL confirmation of cancellation. I demanded written confirmation which I have to date (after weekly follow ups) still not received. On 1 March Securitas wrongfully deducted their service fee (service is pre-paid). I have been battling ever since to get a response and refund. Securitas does not answer their phones or respond to emails.