Paid up letter equery

I have been owing FNB since 2020 and they handed the account over to GL Attorneys which they called in everyday and would email me everyday, when ever I would get money I would pay the debt and last month I got money and settled the debt, till this day no phone call no email of acknowledgement of receiving the money on their side, I made contact and was advised that Lungile is the one handling my debt and will get back to me and till today no communication has been received on my end. May I please get my paid up letter ASAP