Unauthorized debit order

Good day, i'm bringing to your attetion that i'm not happy with the service of ADT security in Bloemfontein.. I send a notification for cancellation of my alarm system on the 30 June as i can no longer afford due to retrenchment however they have been deducting from my account for the last 2 months. I made contact with them for refund however no response. Kind assist as a reversal could affect my credability negatively. Ref no:*** cell number 078****494 e-mail address ***