Please correct this letter I am about to send?

request for payment. due to the economic hardships suffered by my business ,due in part by bills owing not being paid on time,i am requesting that any moneys owed me be paid with all due haste so that we can continue to maintain our good business relationship. i would like the amount in full to be paid by----------<,add date>thank you.-------- . this is much nicer and makes the point very strongly.