Conference phone number BLOCKED by our phone company

We host a lot of meetings and use the phone conference feature that participants can dial into.  Until recently, we are unable to dial out to it from our office, we recieve a busy signal.  I tried it from my cell phone, and it worked.  So I called our phone provider and they explained to me it was on a blocklist along with 10 other numbers becuase they are getting charged for the calls.  They refuse to remove the block.  So now I cannot use the phone conference feature.  The number that is blocked is 218-486-2201.  I have contacted Adobe tech support and spoke to two different people who were unable to help me.  Does anyone know any other numbers I can use?