The furniture etc should have been mentioned in the agreement and properly handed over back to the land lord when the flat was. The agreement should have been made accordingly.
if it was mentioned then a case could lie - of misappropriation perhaps. If not, nothing can be done now.
DISCLAIMER : General information and advice provided is without any warranties as to suitability for any use, correctness and application to any specific case. Please always take proper legal counsel . However, if it helped anyone even a little a " thanks" would be appreciated and would encourage me to keep on making efforts :-) . I am also always open to corrections and further learnings from more experienced Seniors here.