Twice TDS deducted by client

Hi,
Anyone can suggest me the solution for this:

My client has deducted TDS on Advances & Bills too in the F.Y.2018-19, now my CA are saying the Turnover as per 26AS are very high

Please suggest solution for both
1) If my client not agree to revise TDS return &
2) If my client agrees then what's the procedure to get the TDS amount