NO RESPONSE TO ENQUIRY

I renewed (few changes) my contract with ADT in October 2015.I have always made eft payments monthly.I continued doing this even after the changes on my contract.i made payments 25/11/15 , 24/12/15 , 27/01/16 and 29/01/16.I noticed at the end of February that ADT has also been debiting my account every month,therefore receiving double payments.I stopped making these payments.I made an enquiry via the website on 02.04.16 to find out what happens next..Am I receiving a refund? will adt halt debits for the next 4 months?,no response..I sent an email to Miss Davids on 04.04.16 and again on the 14.04.16 enquiring this.I have cc'd [Email Removed] response..This is extremely frustrating,unproffessional and I'm very disappointed in the service.