Poor cancellation process.

One year later I receiving calls from a collecting agency telling me I owe one years fees and that they last received my payments 1 July 2016 and I need to pay until 1 May 2017. This is absorbed as I have sorted out my ADT matters in 2016. I had to relocate from the property where I had installed the ADT security and before moving I called ADT requesting to cancel their service the assistance told me they responded informing me that they require a calendar month notice when cancelling and to send an email to ********** and ********** . Since than the debit orders continued. I did not received a response to the mail up to 2 weeks. I than called adt again and spoke to a different consultant who informed that my contract had been stopped as per their report, the unfortunate part was the debit orders continued I called Adt again and spoke to a Khumalo who request I forward the email to him at ********** he did a background check and told me that my contract was for 24 months with ADT and to cancel the contract I would have to transfer to the current tenant .I than supp**** with the tenants details who they contacted to transfer the current contract to him and I emailed the contact details to ********** ********** and ********** on the 11 Oct 2016 since than I have been sending follow up emails requesting to know if they have transferred the contract to the new tenant after countless emails I didn’t receive feedback, I than contacted the tenant who confirmed that ADT has contracted him and that the issue has been revolved