I Inadvertently Downloaded a Whatsapp App That Resulted in Blocking

I inadvertently downloaded and installed an unauthorized WhatsApp app, which has resulted in my official WhatsApp account being locked. I am unable to log in now,  kindly request your immediate assistance in resolving this issue and restoring access to my WhatsApp account. I understand that using unofficial apps can compromise security, and I deeply regret this error. I assure you that I have learned from this mistake and will only use the official WhatsApp app in the future. Currently, I am receiving an error message stating, "You cannot log in without the official WhatsApp app." However, I have already downloaded and installed the official app from the Google Play Store. Please help me regain access to my account as soon as possible.