Disappointment with Wonga

Good day

I made a final payment on the 11 February 2025 but I used the incorrect reference number. I sent the proof of payment to Wonga to both the collection and customer service departments. To date my account is still not credited. I have sent numerous emails thereafter and no response. I tried calling to speak to an agent but I just an automated vocie that eventually ends the calls no mater which option I choose. It's a nightmare trying to get ahold of one of their agents. Very disappointing