Paid for Premium Service, Not working!!!

I bought premium service and have had it over a year and it hasn;t worked since December 2015, they charged me again, and I still have not gotten a response from them. It worked great when it worked, but I’m not sure why or what happen, so please think twice about installing because if there’s a problem, you won’t get a response at least I haven’t, paid for a app and haven’t been able to use it since last December. There are other app’s that offer same services and developers that value there customers concerns and at least respond within a timely manner to customer technical issues. This could explain why they have a rating low in my opinion.

GiggleAppBuyer about mysms - SMS Texting & Sync, v3.8