Problem with unstaking tokens delegated for validators (BEP network)

Hello everyone

On March 2021 I delegated 1 BNB to be staked for BSC Scan validator.

Recently I decided to unstake my tokens, but I can’t do this because staking page doesn’t have UI elements for unstaking. When I connect my wallet to site it displays correct amount of tokens but there are no active buttons at all. When I go to validators list there are delegate button, but no “undelegate”.

Can somebody explain me how to unstake my tokens?