Short TDS on property sale

I sold a property last year  and  TDS WAS deducted by buyer and deposited  against my PAN. 

Now after one year the buyer has contacted me to inform that he deducted short tds amount. He is requesting me to pay him the short tds amount otherwise he will take legal action. Meanwhile I have already submitted my ITR  which is processed by INCOME TAX DEPT. 

PLEASE ADVISE