if you can go in, take the picture/video for proof. then change the lock/or just chain it and leave a notice there saying you will remove all things within certain period.

do remember to make police report b4 and give sufficient notice (make sure there is proof that you sent the notice).

btw, tnb people takes their own sweet time. you need to chase and monitor them. (they will give all sort of excuses so make sure you are there with them when cut).