Bitbucket locked repo due to invalid repo size, shows 3GB, but it's not 3GB

Hi, I have a repo which shows 3GB size and I cannot push there, I had at one time invalid (justified) size due to one of the members push videos to the repo, but I made everything as in manual to remove the mentioned commit and force recalculating size.

Everything was fine until today repo has size 3GB, pushes disabled.

I just removed last commit (1 line change) and made push --force, something had changed and repo has size 2.8GB. Obviously repo one line commit is not 200MB.

Please, help us recover repository, which has no large files and had size approximately 980MB before problems started.