Trai — regular call drop

We are from a corporate company, having almost 500 corporate connections, believing the way vodaphone has marketed their product from previous connections we have got port to vodaphone 6 months back, from the very 1st day we are facing serious call drops and network issues, many times we had escalated the same to vodaphone, every thing went vein. No proper support so we are approaching trai - kindly support us to come out of this issue.