What is correct protocol to ensure ATT terminates my Home internet and Landline service to avoid additional monthly charges?
For the last six months my ATT internet operates intermittently (which includes landline telephone service). Three months ago ATT updated my modem / router. Since new modem / router the internet service is noticeably less functional. Multiple calls to ATT has not resolved lack of service. What is proper manner to notify ATT to terminate my service, so that I do not incur an additional month of charges?