Contractor did work and have been paying him over time as I do not have the funds. He is now charging me late fees and some are as high as 40% per year on the amount owed as he has miscalculated the amounts. Are there any remedies available to me? Thanks.
If the financed work was for personal, family, or household use - not business related - there are strict limits on interest and late fees. You should contact an attorney in your area to help you deal with this issue.