@Steven112
Does your calendar indicate that someone specific has reserved those dates or are they just blocked?
Doesn’t the STR ban allow you to rent for 30 days or more?
If someone has reserved for 30 days and has already paid, why not just let the reservation stand?
If it turns out that you cannot honor the reservation due to local law, you can always apologize and agree to a full refund.
Other hosts have reported that they have better success in using the online chat system after regular business hours instead of trying to call.