Simprosys Google Shopping Feed

This has been a great app until it disconnected the shopping feed for no apparent reason. We did not realize for a day or so and when it reconnected it connected to the wrong catalogue which also went undetected for a day or so. We are 2 weeks on from that now and we are still trying to get back the lost ground with FB and google shopping. Our sales have dropped by at least 50% because of this fault that Simprosys as been unable to explain except it was some sort of a glitch :(