If it is not your key, then it is not your coin on blockchain, it is not your key, it is HitBTC's key and doge withdrawal was disabled. I have noticed if a coin is having this issue on some exchanges, the coin price may not be correct. The deposit should have been disabled also (or maybe you are warned not to deposit into the address by HitBTC?), but anything stupid can come up from a centralized body like this type.

All I can say is to try to want to convert it to USDT, I think the value of USDT it will be converted to will be displayed, if not displayed, do not take the risk to convert. If it displayed and it is indicating the actual price you are expecting, then you can trade the doge for USDT and then send it out of the exchange to convert it to any coin of your choice on a reputed exchange you sent it to.

HitBTC is one of the exchanges that is unrecommendable, they usually freeze customer's accounts and also have exorbitant transaction fees which is very high even for altcoins. So far you will still convert back to doge, you can look for exchange that support digibyte and doge, then you can convert to digibyte on HitBTC and then to doge on another exchange you transfer digibyte to. Digibyte fee was still less on the exchange when I was using it, if compared to other altcoins.

I have used HitBTC before until I joined this forum to know how the exchange is not worth it io be used.

Make sure you know the amount it will be converted to in USD and relate it to your doge price before converting it, if HitBTC wants to cheat you, do not convert, you will have no option than to wait until the withdrawal is working good again.