Wedding denied by girl parents without any valid reason

Namaste Recently Girl and her parents called denied wedding because of no valid reason. A little bit of background: Engaged to this girl for sometime and wedding date was nearing. Over a social media picture posted by me, which was not mine, the girl and her parents thought I was cheating. About this picture, it is a shadow of boy and girl together over a road. Now this is a very random picture from internet. I liked this picture and wanted to dedicate it to girl and a gesture of togetherness for life long. Now she thinks it is myself and some girl in picture and her parents are supporting her and denies wedding. I clearly assured that it's a random picture and this isn't mine but they don't want to believe. Nor are they able to validly prove it that it's my picture. The problem is wedding date is 4 days away and family, friends and acquaintances have already planned to visit whoever was invited. Additionally as a wedding gift (no dowry involved or asked, all in good faith), my parents have decided to gift her many clothes, gold and few household stuff. Also their parents might have done that (We don't have idea). This is something that people do in many weddings. Once wedding is denied, we just return gifts given till now And over this period, every single time spent, the shopping help and expenses that are involved are going to be worthless. And we don't wish the wedding ends. My and family's reputation is at stake and time and efforts are too much. Not to mention mental trauma. For this wrong doing, I want to file legal complain against their family. Can I legally take action against them for denying further marriage without any valid reason and baseless allegations?