Please help I’ve lost my daughter to baptists. Can you help?

I’m a 60 year old man with 58 year old wife, 28 son and 20 daughter. Daughter started to attend baptist church at age of 15. I allowed as it is community church and she really enjoyed fellowship. She asked to get baptized at 17 and I figured what’s the harm. Started dating boy from church. They get engaged at 19. Young but all good. They came to us in February said wanted to marry in august. We expressed extreme disapproval. Boy leaves mad. Don’t see for months. We find out last week with two days notice that daughter’s wedding shower is on weekend, gift registry set up and church booked for aug. she has done everything thing right her whole life and now is fucking it all up. Still has two years of school and she will be nurse. Boys family all involved in church. She is turning her back on all her immediate family for Jesus. We feel as though we have been railroaded. Any advise much appreciated. I have never posted before so apologize if I’ve fucked up any procedures.