Brad & Burke Heating & AC

He never told me his prices did lousyy work then had to come out and do it again but this time he charged me double. I never signed an invoice or was ever told this. When I called to tell him I woudl not pay this he hung up the phone.   he refused to talk and sent  me a letter saying I was not to call him or contact him.  He then threatened me with later charges. He made up a bunch of lies because I stick up for myself. Now we are goign to small claims cocurt  He is a liar and a bad contractor. he took advantage of me because I am an elderly woman living alone