weak signal

If it has been working for a year with no issues clearly things have changed. It may well be they are upgrading the equipment in the area and this is not uncommon to see disruptions as they work on the equipment during the days in the work week without any advanced notification to users in an area. My guess you are not alone and others in the area are possibly seen the same behavior. It sounds as if you have been in touch with customer support now. Have you been provided assistance above the initial level 1 engineers on the phone? You might need to push a bit harder to get a second tier support person involved and ask MORE questions. Tell them you would appreciate it if they would look closely at the connection information for your service. It might be apparent from their logs why things are poor now. If you are told there is maintenance work or upgrades being done press for a bit more information. Try to get better expectations. You might need to ask to talk with a customer retention specialists and explain to them that you need to have it resolved or you have to consider other options.