Continuous billing of National Security & Fire

Hey

I am a former client of National Security & Fire. Reason for me to stop my contract with it is because I was over billed (even when I used debit order with non payment missed, still they will bill me).

About 3years back I requested my account to be closed (I was further billed on top of successful debit order that I made, cancellation of contract letter sent in12 July 2019 served notice as advised by National Security & Fire stuff. My notice was served as advised for a month ëmail communication also available".

Now it is another thing that I was supposed to serve 3 months contract which was not what was initially said and agreed,

I even have email evidence that shows acknowledgement of billing being stopped. Today after I receive another request from them to pay bills for a month "Sept & Oct 2019" after I was not their client (irrespective of all money paid and noticed served "served according to their advise".

Please help me to as I feel like justice will never be prevailed of one thing after the other. I never miss my accounts payments. Never. Actually I was just paying what they deemed is due for them for peace sake and my account to be closed.

Now I feel like I living an endless circle even after I was told they account/billing is closed.