Equitable Acceptance trying to keep me from cancelling their service Minneapolis Minnesota

I enrolled in a government student loan forgiveness program earlier this year, but could not remember their name. They did not start wanting to take money out of account till later in the year. My mother died earlier in the year and when I tried to contact the original number back that I had talked to them originally it was not them but just a person. That set off a red flag to me and I decided to go through my school for the student debt forgiveness. A couple of months ago they contacted me and I talked to a guy called oscar and told them that I went another route and was cancelling, he told me that I could not cancel and that there would be a fee and hits on credit score. I paid to have a stop put at the bank so they cannot take the money out but they are calling and emailing insisting on still wanting to take the money out. I emailed back and told them that I have a right to cancel if I want and do not appreciate being harrassed. Oscar sent and email back and said that they were not harrassing and that I could get a lawyer if I wanted.