How to force opposite party bring witness and medical on record

I am facing fake DV case. The girl side made story that she came to house & 5 people of my family beaten her. Her government medical also done. While cross examination she accepted the she was beaten up & govt medical done & her long distance related brother saw the incident. After that we filed the copy of our CCTV. Nothing of the sort had happened. Fake story she fabricated. We asked for brother witness, they denied. We filed CrPC 311, as alone eye witness, trial court judge allowed. But now they filed sessions court appeal that they have the right that whom they want to witness or not. Sessions judge is in there favour that we cant compel them for witness. If we want we can call brother in defence. We dont where that brother lives? We said that she should file her govt medical, she refused that as well. We have applied for CrPC 91. The judge said that we cannot compel them. Please suggest how to force them to bring witness and medical on record, so we can prove her conspiracy?