Customer service is almost as bad as actual phone service

The phone service has suddenly become unreliable and patchy at best. Most times I have no service. This started in the beginning of December . I've spent countless hours on the phone w/ customer care and tech, but no one seems to know what is going on; I keep getting different information, and sadly customer care is not what it sue to be… My situation was escalated to the senior executive specialist, but he could not even get through my number to call, couldn't even leave a message, due to the poor phone service provided by his company… I wonder how many calls I'm not getting… I did however get an email form the executive, only to learn, he could not understand what was happening, and sadly could not offer me any other advice or support; I've been w/ T-Mobile for over 18 years and never had any problem, but obviously something has seriously changed and ALL calls are either dropped or never received. SO FRUSTRATING! And the executive to have no ideas for a solution is pretty troubling.