East side lenders and unauthorized ach amounts

I have a balance with East Side Lenders. I am working with a credit counseling company that worked out an agreement with them on June 2nd. East Side Lenders accepted the work out contract. On my next payday they debited my account for 1125.00 in two transactions. I worked with my bank and was able to stop payment on them, but it was purely luck that this worked. Today, I received two calls from them and they don't see the agreement. I said Linda was on the phone with my bank telling my bank that this was an unauthorized ACH and she had an agreement with me and my credit counseling company. Someone else called tonight and I reminded them about their agreement with their date they signed and she said, "we haven't turned off your ACH, yet and I will check with my supervisor and call you tomorrow." So far every time I work with their department nothing gets done on their side. Is their a letter to revoke all ACH transactions on my account? My credit counselor has spoke to them too to try and get this resolved. Thanks for any advice! -SO STRESSED