I renegged on a loan and it was sent to Arrow Financial services for collection. The original loan was set at 28 %. I was paying $91.00 a month to the original loan. Then we made a deal with Arrow to pay $140.00 a month. We paid this for 11 months and the amount was going up not down. We called them and one of their people said they were charging us 57 1/2 % interest. Is this legal?