Extremely unhappy with the service and lack of feedback

After being a long-standing client of ADT, it amazes me how poorly you treat your clients.

We replaced our receiver a year ago and paid over R5000 to get it replaced and with new remotes, In May this year we requested a technician to come out to check our outside signal as it was not working, they are now sending me a bill of R1929.00 for the replacement of the receiver.

If you must change your receiver every year it must say something about your product and now you expect your client to absorb this cost, then I might as well cancel my contract and go to another provider who can offer me quality and service which I am clear not getting here

We have been clients of ADT for years and have never missed a payment, but this is becoming costly to be your client

I have been back and forth with numerous calls made to the support center and they keep telling me they are escalating the matter, but nothing happens, and I just keep getting sent the invoice requesting payment Please can I get this resolved ASAP