You would have to file a motion with the court to correct a clerical error in the record, then get the motion set for hearing. The hearing would likely be set well beyond the 10-day window at issue. Filing a motion would draw attention to the receipt date and could prompt your ex to pay the filing fee that would otherwise not get paid. Your best course is probably to wait the extra 10 days, then file a motion to move the case back and correct the record. If the ex pays during the 10-day window, you can still file a motion to move the case back and correct the record, arguing that the payment is untimely once the record is corrected. I recommend hiring an attorney to assist you in this matter.
If we do not have a written attorney-client agreement: I am not your lawyer; you are not my client; this is not legal advice.