Is XZDL Global a scam, or is it legit?

My account has been frozen and they are not allowing me to withdraw my funds. they are saying I need to send them more money in order to withdraw my funds, money that they will then use to pay taxes but then return to me. it is illogical. they do not have a way to contact a person other than through chat but the chat is highly limited. they have disabled my ability to chat. I asked them to subtract funds from my account in order to receive my balance but they are saying the only way to get my money is to send them more money…I have also submitted a payment plan to the irs which they originally told me to do and showed them proof but they then changed their instructions indicating I had to pay them. I am not sure why this case was closed originally, perhaps I did something wrong when submitting.

I have more if needed.