Never received incorrect debit order back

Good day, <br> <br> After 9 years of service with ADT, I finally cancelled my service because of their bad communication. The debit order would be high one month with no notice and then I would be told that they sent an SMS. This continued despite my complaint that I never received any e-mails, post of SMS during the 9 years.<br> <br> I tried to cancel my services in January but it was not processed. I again sent through another cancellation as I had no idea what was going on. When I cancelled I tried to figure out when my service would come to an end but again no response. I then phoned and it was confirmed that it expired at the end of January. I then asked for the February debit order to be reversed. I phoned 4 times to try and sort this out and each time they told me the person who works on my account will phone me back. To this day I still have not received the call or got the money back for services that they did not deliver.<br> <br> I would appreciate it if someone could call me back and sort this out please?<br> <br> Thanking you.<br> Bianca