Southwest Credit Systems They autodialed me on father's day Sunday evening. Than called the very next morning harassing me. Nationwide

This company has called on various occassion at numerous odd times such as yesterday which was a Sunday and a holiday(Father's Day)! I answered and had to press 1 and it's a autodialer asking me to call. I became totally livid at this point They than turnaround and call me before 10am again this time a person is on the phone and starts to harrass me as I explained what happened the day before. Instead of showing any empathy he hung up on me as I began to inquire about the so called debt, I don't owe. It's affecting my credit and I want them reported for scaming me and maybe a class action suite for the autodialer. Any thoughts?