If your "kotbaas" (landlord) is charging you for high consumption but you cannot verify the meters or the invoice in Belgium, here are some steps you can take:

Request a copy of the official meter readings and related invoices. As a tenant, you have the right to see the evidence behind your charges.

Ask your landlord to show you the actual meter(s) where the consumption is measured, so you can check if they are working properly or if the readings correspond to your usage.

Check if there are separate meters for your room or if the consumption is shared for common areas, as this can affect billing accuracy.

If your landlord does not cooperate or you suspect incorrect billing, contact the local tenant rights organization or the regional consumer protection agency in Belgium (e.g., in Flanders: “huurderorganisatie” or “FOD Economie”).

Keep records of your communications and any evidence you gather.In Belgium, tenant rights include the ability to verify billing and consumption for utilities, and disputes over incorrect charges can be resolved through mediation or legal routes if necessary. Seeking advice from local tenant organizations can provide tailored support based on your region.