Dowry group

Their customer service is very poor,instate of they explain to a client in detail,they insult and being arogant to their clients,iam referring to the ladies from their finance or collection department.I stopped to have a service with them,after I told them to report to their armed system as we're not doing well.After I called them for that report ,they said I will pay for my cost if they send their technician for repair.I was like nervous when I hear that as I did nothing wrong to their system,I cannot do anything to it .Nothing was working for 2 months and they busy deducting my money,I then stop and reverse because I didn't have service,after I ve done that ,they started to buck on me.How can they deduct though I don't have a service with them.They claimed that iam owing them 2 months of my money,.Then the statement came to say I owe 00 I paid them before the service was terminated.They came again ,and I send them the proof that iam not owing them ..they then kept quiet for 3 yrs ,and they then came now by saying iam owing them their radio transmission that they replaced,To my surprise what I know I paid to for the radio before the replacement otherwise they cannot replace,that was before the stoppage of their service.I guess someone is not doing the correct job there.please assist I don't owe this people they must stop bucking on me ,they frustrate me all the time.ADT ALSO DOES THE SAME WHEN U LIVE THEM THEY CLAIM THAT U ARE OWING THEM