Huge meter reading

Hello! Perhaps the question is not in this category, but I do not even know where to attribute it.
Since the installation of the meter on the garden plot, no electricity was used. The meter reading should be 0. In May, Mosenergosbyt checked, according to which the meter readings were 0. No work was done on the site and by the moment the readings should also be 0, but according to the documents sent (as well as visually on the meter) now (by 1 November) consumed 20172 kWh (twenty THOUSAND kWh). What can be wrong? I can’t even imagine that such a thing had to be connected in order to run into such an amount ?!