Pre wedding dowry

My name is akash kurmi. I'm 27 year old completed mbbs presently resides in indore In the january of this year I got engaged with a girl. Girl is from place near bhopal She has done Mcom and Bed and according to herself and her Family she wanted to pursue PhD. The day I went to see her she was looking beautiful. I promised her if she want to Purse phd I and my family would always support her. I didn't talked much with the girl due to my shy nature and later engagement happened on 31st may 2017, with a marriage to be fixed aftr 1 year. But when I started talking to her over the phone, There were lots compatibility issues and intellectual mismatches. She never told me anything truthfully when i asked her about anythning Later after asking 2-3 times she accepted that she was lying Bt after somtime she again denied So many times i got her phone engaged She created a doubt in my mind by telling lie or changing answer everytime .. i tried so hard not to think about all this bt it didnt work Finally i told her about this n we agreed to keep to ourself bt later that night she called my relatives and told everything i said and start defaming me So many issues arises after that Finally I understood that she is not meant for me. I told my family about this but since Engagement had already happened they pressured me saying what others will think and about social shame. and insisted for marrying the same girl. It happened 3-4 times in last 6 months Finally I told the girl and her family about my decision, that I could not marry her and even If I marry her under social pressure It would not be good for the future of our both and later a situation of divorce might occur. Now I know that there are few mistakes from my side that I should not have said yes for marriage just by seeing her one time. and after talking to her If it was clear in my mind not to marry her I should have taken this step months ago what I did today. Now I'm worried that If her family could defame us in any case. The thing is when tht marriage talking were going on her father came to us and said we will give anything u ask for any amount u want . But my father and my grandfather denied and said that we do not take anything Then her father asked d same thing to my relatives and they answered that they are not demanding anything But he insisted and said “ she is my last and youngest daughter ill do what i have to do. On engagement they gave us some amount in case we denied to take but they insisted.. now that all happened and i m worried most probably I guess is they will try to defame us under a case of dowry demand. But we didn’t demand any dowry I just wanted to know could I or any of my family member get jailed just because I denied to marry a girl after 5 months I agreed to marry her. please let me know what prevention I can take to avoid this situation.