Settlement letter

I have an account that fell in arears with rcs after i had spoken to them and arranged for my monthly payments to be made via direct debit. When i contacted them i was informed my account has been janded over to b & d attornys. I then got intouch woth them and asked for a settlement amount and paid it. My only request was that once the payment went through i wanted a settlement letter. The guy at b & d attornys told me it will take 2weeks as rcs will need to take the money from them before i can get the settlement letter. I waited the two weeks and called. The sittuation to this day is that rcs is saying they can not find the payment. B & d attornys are saying they waiting on rcs to collect the money.. everytime i call i get a different story. B & d is now saying they can not find the payment and rcs promised ill get a call back in 24 hours its now been a full week and still nothing.. all i want is a settlement letter so i can have this given to itc to update my credit file. Why is this so hard? Rcs should be closed down as a company. They are a true reflection of ****ty business people. The agents working for them are more upset then you are and all you doing is trying to get your issue resolved.