Unhappy customer, Terrible service the worst ever

I have paid up my Lewis account on the 30 April 2025 and I need my paid-up letter. Lewis has sent them the letter, but they do not want to issue it to me. This company is telling me that they cannot issue me the letter because, they (I mean they) havent paid over the money to Lewis. They will only issue me once they pay Lewis. They only to pay overs on Mondays. They had a Monday of the 5 and 12 May but they chose not to pay. How is it that this is now my problem as I have paid up and only request my letter. Why do their internal processes now affect me?I am losing out on a good deal because of their stinking terrible service. Their service is terrible with agents full of bad attitude. The agent has the decency to tell me that even next week there is no guarantee that I will get this letter with a very rotten attitude. How is it my problem that they havent paid over??? I have sent the POP already on the 30/04/25