What happened to your DOGE balance? Has it disappeared, been frozen, or something else? Usually, there's an option to convert it to them native token, and then you can withdraw it.
As far as I can remember, when DOGE price pumped significantly, HitBTC tricked users to force sell their DOGE in HitBTC with discounted price. Due to their so called "maintenance", users couldn't withdraw the DOGE at that time.
What exactly happened in the background, IMO, is- hitBTC sold user's DOGE coin when it pumped a few hundred percent within a few days thinking that the price will go down but it never did at that time and pumped even more.