ADT charging fees out of contract and not paying it back

In June 2017 I signed a contract for the services of a day street guard and street security cameras. The contract clearly stated the starting date as 1 September 2017 as the cameras still had to be erected. However, come 1st of July I got debited the full amount for both services. After reporting it to them, a credit was created but never refunded. Then 1st August, yet the same thing happened and I was charged again.

So, I have been paying for a service which is not in place yet, and as such ADT is in breach of their contract and not owing up to it. I have dealt with countless people, each saying the refund for the 2 months are being paid, but here I am. No refund.. (All names and contact details available)

I have not expected this from such a big company, and this has definitely changed my relationship with them for the worse. Will rethink the way forward.