Church employee broke one of my vases but Church claims they aren''t responsible unless permission to leave the vases was given. What to do?

I am a floral vendor that supplied flower arrangements for a wedding client last October. After the wedding on Saturday, the altar arrangements were left at the church for Sunday mass. Later in the week, a church employee broke one of my vases while cleaning it. The Catholic church Diocese is claiming client liability unless permission was given to the client from the Pastor to leave the vases after the wedding. The client''s mother insists that the pastor gave permission on the night of the wedding. I know the individual church (and probably the entire Catholic church) provides a Hold Harmless agreement to the clients upon renting the facility. However I''m not sure how this would apply since several members of the Diocese claim that liability is dependent on whether or not permission to leave the vases was granted. It seems like a he said-she said fiasco and I''m not sure how to approach it from here. It''s coming on the 1-year anniversary of this nightmare and I''m still getting nowhere on