We have been monitoring the situation in which we found that the error is caused by an employee, it is because our staff is not yet ready for service as a result of our bad service.
We have examined the situation, we find that the error was caused by staff because our staff is not ready for service as a result of our service is poor.
We have reviewed the situation we find that the error caused by employees because of our staff is ready for service as a result of our services look bad.