I made a promise to the hospital to pay so much money per month on a bill the VA would not pay.I said I will try to give you $15 but some months could be less but, It would get paid and I hoped to have it paid for in 6 months . Well the bill has not been paid off as of yet but, I have been paying faithfully EVERY MONTH! Now I am getting letters from collection agencies , do they have that legal right to do this and if not , should I seek an attorney??

Thank you