ITC Not Shown in GSTR 3 B by Purchasing Party

we made billing to one party in march 2018 . and we have also filled GSTR 1 FOR march month and paid taxes .and also show that party name
but the other party to whom we made billing did not receive invoice due to our fault and he did not take ITC FOR this and he deposit tax according to GSTR 3
Now what will be solution for this.

Please help