Hi - not appropriate for formal letter. Dear (their name)
I understand that you need the details of all invoices issued to MERCAN and I am working on supplying the information you need . You must know that recharging is not an easy process, especially collecting the right information .
Last month's recharges were quite (old dated - not sure what you mean). There were from Georgia's expense from . She has informed me? that all the approval emails were attached to the original invoices but unfortunately she has emptied her email box so I could not send you approval email with the statement?. But I did attach copies of the approval emails to the original invoices and posted them to MERCAN at least 3 weeks ago .
In future, when I am able to, I will send you the approval invoice by email before we proccess the recharge. You do not need to repeat me this . When something goes wrong just simply ask but please do not tell me how I should do my job. I do find your email very offensive
I have already discussing improvement to the recharge system with INCI and JON. I know it is not perfect and must make your job difficult but we should be patient and find a better and more efficient way to work together.
Please let me know the numbers of all invoices that you have a problem with and I will find back up for them.