Tax Resolution Services review: tax service rip off

I paid tax resolution services $4, 900 after my bank account was levied in December. This was supposed to be a flat fee for their services. Within 48 hours of my check clearing they called me and told me I had to pay another $2, 000 to take care of services not included in the original fee.. When I asked for an itemized invoice detailing what I was paying an extra 2k for they had no answer. They told me they couldn't even contact the irs until i paid the extra 2k, it was classic bait and switch. I have reported them to the BBB, and I'm not alone apparently this has been happening for some time. It is a matter of time until they are shut down.