ZERO response 3 months into a contract to questions about the app not working properly

This is the THIRD month in which my app does not work properly. Each month "corrections" are made but I have to contact VA to ask for these. When ever I ask if there is feedback k ad to the app working properly my questions are IGNORED. It has now been nearly a week since my last email, zero reply. It is 3 days since my inquiry via their website, still no call-back... Where is the customer service...??