Girl family is not giving respect, lies in case of caste, father's job, etc

After engagement, boy parents went for girls home with relations, but they are not at all giving respect to the boy parents and realtions. Girl father telling my girl will not come for mother in law home she will study in my home only soft arguments gone inthat time girls father's shouted and moved from that place. Do u know wat is studies like that. That girl wants to study IAS so will be in mother's home she won't move to husband house. After 4 days We intimated to girls realtions (thaimama) he is contacting for marriage with us. That we are not interested in this marriage no respect for us. After this issue the girl suddenly messgaed to the boy that she is ready to come and live. Every time they are changing words one time coming other time not coming. We are scarred about this. How shall we proceed on this. Note: we have not asked any dowry but we heared they are complaining in surroundings that's we asked for dowry. From boy side only we gifted 4 3/4 savaran 15000 saree to the girl. Kindly advice how to move on this case.