Unfortunately it is forever with the free accounts and there is no way to reverse this. Having lived on both sides of the Hubspot fence (paid and free), there are definitely 2 different bars of measure for spamming and the free side is a bit extreme in my opinion. All you can do at this point is setup a new account as support does not have a way to re-activate your original account. There are other free email providers that you can use, some event connect to Hubspot CRM and I would recommend that as an option moving forward if you wanted to keep using Hubspot CRM and you could always switch to their email down the road if you move to their paid accounts.