Poor service

Vimba security company's service is very poor, Im very disappointed with regard to their service, since 2016 I installed an alarm system at my residence, the package includes armed response, SMS notification when you arm and disarm, but their SMS notification only works for few days, then after you don't receive any SMS notifications, I have been complaining since 2016 and they will fix the problem for few days, and again and again back to square one, Im sick and tired because I'm paying every month but I don't get the value of what Im paying for.