WINDHAM PROFESSIONALS LIED TO ME ABOUT HOW MUCH I OWE AND KEEP CHANGING THE PRICE ON ME SALEM, New Hampshire

They keep changing the amount of money i owe them.  when i was first contacted by them by letter,  they said i owe $850..  i agreed to pay them $50. so i wouldn't get my taxes taken away this coming year again. started in june 2009   in november i called because i was curious if i was going to be removed from default status and they said no and when i asked my balance they said i owed 1,921.89   still  .  i asked if they had somewhere online where i could check my balance they said no and they would mail me something ,, they never did.. Am still paying this but im questioning  if they really are a real company  and wonder if my money is counting towards my defualted loan